National Dex Ubers Meteor Beam Eternatus

[Eledyr]

[SET]
name: Meteor Beam
move 1: Meteor Beam
move 2: Dynamax Cannon
move 3: Sludge Bomb
move 4: Flamethrower / Fire Blast
item: Power Herb
ability: Pressure
nature: Timid
evs: 252 SpA / 4 SpD / 252 Spe
tera type: Dragon / Fire

[SET COMMENTS]

• Meteor Beam Eternatus is a very potent threat that fully exploits its offensive potential while keeping some of its good defensive traits thanks to its Poison typing, which allows it to come in and absorb Toxic Spikes and Toxic.
• Not only does Meteor Beam boost Eternatus's already good Special Attack, it also lures in and removes Ho-Oh while dealing great damage to targets such as Yveltal, Primal Groudon, and Primal Kyogre.
• Dynamax Cannon is the premier STAB move of choice for Eternatus, and it's preferred over Draco Meteor and Dragon Pulse because despite its low PP, it has high Base Power and no drawbacks, and it also keeps key KOs. For example, after a Meteor Beam boost, Eternatus can 2HKO specially defensive Primal Groudon with Dynamax Cannon as well as 2HKO Primal Kyogre with the move after Stealth Rock damage.
• Power Herb is required to make Meteor Beam a single-turn attack. This also means that Meteor Beam Eternatus will generally get a single opportunity to set up and make progress.
• Sludge Bomb is important to remove Fairy-types like Xerneas and Arceus-Fairy, which can otherwise easily survive what Eternatus throws at them and use it as setup fodder. Spreading poison with this move is also useful to hinder some of its soft checks, like Primal Kyogre, Arceus-Ground, and Ho-Oh.
• Flamethrower covers Steel-types like Necrozma-DM, which takes pitiful damage from Dynamax Cannon and Meteor Beam and can force Eternatus out by setting up with Dragon Dance or crippling it with Thunder Wave. Fire Blast can be used for its higher Base Power in order to take out defensive Necrozma-DM as well as Zacian-C at +1.
• A Timid nature is crucial in order to outrun unboosted Ultra Necrozma and certain threats like Arceus, Mega Salamence, and Marshadow. It also Speed ties with opposing offensive Eternatus.
• Tera Dragon further increases Dynamax Cannon's damage output, allowing Eternatus to menace key threats. For example, +1 Tera Dragon Dynamax Cannon can 2HKO Tera Water Zygarde-C and can OHKO it prior to Power Construct after a layer of Spikes. It also 2HKOes Ho-Oh and OHKOes Marshadow, and it additionally OHKOes defensive Arceus-Ground after a layer of Spikes.
• Tera Dragon also suppresses Eternatus's weaknesses associated with its Poison typing, letting Eternatus survive Primal Groudon's Precipice Blades, Ultra Necrozma's Photon Geyser, and Arceus-Ground's Judgment.
• Tera Fire turns the tables against Zacian-C, allowing Eternatus to not only survive any hits from it but also OHKO Zacian-C with Fire Blast without a boost. Tera Fire Eternatus can also benefit from its new resistance to Fairy-type attacks to serve as a check in a pinch to Geomancy Xerneas and Calm Mind Arceus-Fairy and revenge kill them.
• Meteor Beam Eternatus fits best on offensive teams that are looking for a mid- to late-game wallbreaker and cleaner with sufficient Speed to outrun common threats to offensive teams like unboosted Ultra Necrozma and Xerneas. Cleaners like Double Dance Primal Groudon and Extreme Killer Arceus as well as wallbreakers like offensive Calm Mind Primal Kyogre and Ultra Necrozma appreciate the support of Eternatus chipping their shared checks like Primal Groudon, Ho-Oh, and Giratina-O.
• Sticky Web support from teammates like Smeargle, Shuckle, and Ribombee further increases Eternatus's ability to threaten common anti-offense builds like Choice Scarf Xerneas and Dragon Dance Ultra Necrozma, allowing it to outrun and remove both of them.
• Despite its natural advantage, Eternatus can struggle in dealing with Geomancy Xerneas if it still has access to Terastallization, and Tera Dragon Eternatus is OHKOed by Moonblast. A solid check like Primal Groudon is useful in order to cover this possibility.

[SET CREDITS]
Written by:
https://www.smogon.com/forums/members/eledyr.415367/
Quality checked by:
https://www.smogon.com/forums/members/zrp200.327515/
https://www.smogon.com/forums/members/gangsta-spongebob.535530/
https://www.smogon.com/forums/members/bobsican.434487/
Grammar checked by:
https://www.smogon.com/forums/members/clouds.356215/
https://www.smogon.com/forums/members/zrp200.327515/

 

[Zrp200]

Not really going to touch gp stuff here.

additions
remove/rework
comment

qc amcheck

[SET]
name: Meteor Beam
move 1: Meteor Beam
move 2: Dynamax Cannon
move 3: Sludge Bomb
move 4: Flamethrower / Fire Blast
item: Power Herb
ability: Pressure
nature: Timid
evs: 252 SpA / 4 SpD / 252 Spe
tera type: Dragon / Fire

[SET COMMENTS]

• Meteor Beam Eternatus is a very potent threat which fully exploites its offensive potential, while keeping some of its good defensive traits.
• Not only that Meteor Beam boosts Eternatus's already good Special Attack, it also lures in and remove Ho-Oh, and deal great damage to neutral and sensitive what does this mean? targets like Yveltal, Primal Groudon, and Primal Kyogre.
• Dynamax Cannon is the premier STAB choice for Eternatus, and it's preferred to over Draco Meteor or Dragon Pulse because despite its low PP, it has a high base damage and no drawbacks, and it keeps key damage calcs. For example, after a Meteor Beam boost, Eternatus can 2HKO specially defensive Primal Groudon with Dynamax Cannon, as well as Primal Kyogre after Stealth Rock damage. mention the general one-shot nature of meteor beam eternatus; yes I know it's still perfectly usable if forced out after meteor beam, but it can only truly attempt to break once
• Sludge Bomb is important to remove Fairy-types like Xerneas and Arceus-Fairy, which can otherwise survive easily to what Eternatus throws at them and use it as setup fodder. Spreading poison with this move is also useful to hinder some of its soft checks like Primal Kyogre, Arceus-Ground, and Ho-Oh.
• Flamethrower covers Steel-types like specially defensive rarity of spdef ndm notwithstanding, pretty much any ndm falls into this category: dd ndm (and ultra...) can dd twice against non-fire coverage meteor beam eternatus and then reverse sweep Necrozma-DM, (AC) which takes pitiful damages from Dynamax Cannon and Meteor Beam. discuss what the steels do to stop or exploit eternatus
• A Timid nature is crucial in order to outrun unboosted most common ultra set is dd and it's possible for it to get a boost off in front of Eternatus without dying Ultra Necrozma and certain threats like Arceus and Mega Salamence. Mention speed tie/outspeed with opposing Eternatus here to prevent lo variants from outspeeding and ohkoing, and also Spectral Thief Marshadow, which while it might not be able to actually kill etern, it can still take the boost.
• Tera Dragon further increase Dynamax Cannon's damage output, allowing Eternatus to menace key threats, as it can 2HKO Tera Water Zygarde-C (1) be sure to clarify that this is at +1; it does not need hazards for this, and hazards won't let non +1 do it (2) mention the +1 Tera Dragon Dynamax Cannon OHKO on Tera Water Zygarde-50% after a layer of spikes, as well as KOes defensive Arceus-Ground after Meteor Beam and Spikes damage. Tera Dragon also suppresses Eternatus's weaknesses associated with Poison-type, letting it survive Primal Groudon's Precipice Blade, Ultra Necrozma's Photon Geyser, and Arceus-Ground's Judgment. mention 2hko on ho-oh from full, which can be important if Meteor Beam did not end up hitting it
• Fire Blast alongside Tera Fire can be used in order to OHKO specially defensive Necrozma-DM after Meteor Beam damage. (1) should also mention that Tera Fire can prevent Zacian-C from doing serious damage to Eternatus, and also that +1 Fire Blast OHKOes it without tera (2) Tera Fire can be handy against Xerneas attempting to use Tera to set up against Eternatus, since the type change allows it to live a single moonblast and KO back (3) Being able to OHKO NDM punishes ultra specifically for attempting to use the steel typing against Eternatus (4) wonder if this should be moved earlier since Fire Blast isn't mentioned at all until this point, but I don't feel too strongly about it
• Meteor Beam Eternatus fits best on offensive teams that look for a mid- to late-game wallbreaker and cleaner with sufficient Speed to outrun common threats to offensive teams like Ultra Necrozma and Xerneas. give examples of some good offensive pairings
• Sticky Web support from teammates like Smeargle, Shuckle, and Ribombee further increase Eternatus's ability to threaten common anti-offense builds like Choice Scarf Xerneas and Dragon Dance Ultra Necrozma, allowing it to outrun and remove both of them.
• Despite its natural advantage, Eternatus can struggle dealing with Geomancy Xerneas if it still has access to Terastallization mention tera removing its poison weakness and getting ohkoed by +2 moonblast. A solid check like Primal Groudon is useful in order to cover this possibility.

[SET CREDITS]
Written by:
https://www.smogon.com/forums/members/eledyr.415367/
Quality checked by:
https://www.smogon.com/forums/members/user2.102/
https://www.smogon.com/forums/members/user3.103/
Grammar checked by:
https://www.smogon.com/forums/members/user4.104/

 

[Gangsta Spongebob]

Great work to both of you, QC 1/2 when implemented

QC 1/2

Zrp:
additions
remove/rework
comment

SSJ:
Add Remove Comments

[SET]
name: Meteor Beam
move 1: Meteor Beam
move 2: Dynamax Cannon
move 3: Sludge Bomb
move 4: Flamethrower / Fire Blast
item: Power Herb
ability: Pressure
nature: Timid
evs: 252 SpA / 4 SpD / 252 Spe
tera type: Dragon / Fire

[SET COMMENTS]

• Meteor Beam Eternatus is a very potent threat which fully exploites exploits its offensive potential, (Remove comma) while keeping some of its good defensive traits.
• Not only that Meteor Beam boosts Eternatus's already good Special Attack, it also lures in and removes Ho-Oh, (Remove comma) and deals great damage to neutral and sensitive what does this mean? Say something like "targets weak to its attacks" targets like Yveltal, Primal Groudon, and Primal Kyogre.
• Dynamax Cannon is the premier STAB choice for Eternatus, and it's preferred to over Draco Meteor or Dragon Pulse because despite its low PP, it has a high base damage and no drawbacks, (Remove comma) and it keeps key damage calcs. For example, after a Meteor Beam boost, Eternatus can 2HKO specially defensive Primal Groudon with Dynamax Cannon, as well as Primal Kyogre after Stealth Rock damage. mention the general one-shot nature of meteor beam eternatus; yes I know it's still perfectly usable if forced out after meteor beam, but it can only truly attempt to break once
• Sludge Bomb is important to remove Fairy-types like Xerneas and Arceus-Fairy, which can otherwise easily survive easily to what Eternatus throws at them and use it as setup fodder. Spreading poison with this move is also useful to hinder some of its soft checks like Primal Kyogre, Arceus-Ground, and Ho-Oh.
• Flamethrower covers Steel-types like specially defensive rarity of spdef ndm notwithstanding, pretty much any ndm falls into this category: dd ndm (and ultra...) can dd twice against non-fire coverage meteor beam eternatus and then reverse sweep Necrozma-DM, (AC) which takes pitiful damages from Dynamax Cannon and Meteor Beam. discuss what the steels do to stop or exploit eternatus
• A Timid nature is crucial in order to outrun unboosted most common ultra set is dd and it's possible for it to get a boost off in front of Eternatus without dying Ultra Necrozma and certain threats like Arceus and Mega Salamence. Mention speed tie/outspeed with opposing Eternatus here to prevent lo variants from outspeeding and ohkoing, and also Spectral Thief Marshadow, which while it might not be able to actually kill etern, it can still take the boost.
• Tera Dragon further increase Dynamax Cannon's damage output, allowing Eternatus to menace key threats, as it can 2HKO Tera Water Zygarde-C (1) be sure to clarify that this is at +1; it does not need hazards for this, and hazards won't let non +1 do it (2) mention the +1 Tera Dragon Dynamax Cannon OHKO on Tera Water Zygarde-50% after a layer of spikes, as well as KOes defensive Arceus-Ground after Meteor Beam and Spikes damage. Tera Dragon also suppresses Eternatus's weaknesses associated with Poison-type, letting it survive Primal Groudon's Precipice Blade, Ultra Necrozma's Photon Geyser, and Arceus-Ground's Judgment. mention 2hko on ho-oh from full, which can be important if Meteor Beam did not end up hitting it
• Fire Blast alongside Tera Fire can be used in order to OHKO specially defensive Necrozma-DM after Meteor Beam damage. (1) should also mention that Tera Fire can prevent Zacian-C from doing serious damage to Eternatus, and also that +1 Fire Blast OHKOes it without tera (2) Tera Fire can be handy against Xerneas attempting to use Tera to set up against Eternatus, since the type change allows it to live a single moonblast and KO back (3) Being able to OHKO NDM punishes ultra specifically for attempting to use the steel typing against Eternatus (4) wonder if this should be moved earlier since Fire Blast isn't mentioned at all until this point, but I don't feel too strongly about it Move Fire Blast to the point explaining Flamethrower. Tera Fire should just mention the calcs it helps for both moves and the defensive points zrp mentioned Edit: Grand Cayman noted that Tera Fire lets FBlast OHKO Zacian-C without a boost
• Meteor Beam Eternatus fits best on offensive teams that look for a mid- to late-game wallbreaker and cleaner with sufficient Speed to outrun common threats to offensive teams like unboosted Ultra Necrozma and Xerneas. give examples of some good offensive pairings
• Sticky Web support from teammates like Smeargle, Shuckle, and Ribombee further increase Eternatus's ability to threaten common anti-offense builds like Choice Scarf Xerneas and Dragon Dance Ultra Necrozma, allowing it to outrun and remove both of them.
• Despite its natural advantage, Eternatus can struggle dealing with Geomancy Xerneas if it still has access to Terastallization mention tera removing its poison weakness and getting ohkoed by +2 moonblast. A solid check like Primal Groudon is useful in order to cover this possibility.

[SET CREDITS]
Written by:
https://www.smogon.com/forums/members/eledyr.415367/
Quality checked by:
https://www.smogon.com/forums/members/zrp200.327515/
https://www.smogon.com/forums/members/gangsta-spongebob.535530/
Grammar checked by:
https://www.smogon.com/forums/members/user4.104/

 

[Bobsican]

Add QC 2/2 after applying the stuff below

Add Remove Comment

kamehameha

[SET]
name: Meteor Beam
move 1: Meteor Beam
move 2: Dynamax Cannon
move 3: Sludge Bomb
move 4: Flamethrower / Fire Blast
item: Power Herb
ability: Pressure
nature: Timid
evs: 252 SpA / 4 SpD / 252 Spe
tera type: Dragon / Fire

[SET COMMENTS]

• Meteor Beam Eternatus is a very potent threat which fully exploits its offensive potential while keeping some of its good defensive traits.
• Not only that Meteor Beam boosts Eternatus's already good Special Attack, it also lures in and removes Ho-Oh and deals great damage to targets that are weak to its attacks, such as Yveltal, Primal Groudon, and Primal Kyogre.
• Dynamax Cannon is the premier STAB move choice for Eternatus, and it's preferred over Draco Meteor or Dragon Pulse because despite its low PP, it has a high base damage and no drawbacks and it keeps key damage calcs KOs less vague and more direct. For example, after a Meteor Beam boost, Eternatus can 2HKO specially defensive Primal Groudon with Dynamax Cannon, as well as Primal Kyogre after Stealth Rock damage.
• Power Herb is absolutely required to make Meteor Beam a single turn based attack. This also means that Meteor Beam Eternatus will generally get a single opportunity to set up and make progress.
• Sludge Bomb is important to remove Fairy-types like Xerneas and Arceus-Fairy, which can otherwise easily survive to what Eternatus throws at them and use it as setup fodder. Spreading poisoning with this move is also useful to hinder some of its soft checks like Primal Kyogre, Arceus-Ground, and Ho-Oh.
• Flamethrower covers Steel-types like Necrozma-DM, which takes pitiful damages from Dynamax Cannon and Meteor Beam and can force Eternatus out by setting up with Dragon Dance, or cripple it with Thunder Wave. Fire Blast can used for its higher base power in order to take out defensive Necrozma-DM as well as Zacian-C at +1.
• A Timid nature is crucial in order to outrun Ultra Necrozma and certain threats like Arceus, Mega Salamence, and Marshadow. It also outruns or Speed ties add "s" with opposing Eternatus.
• Tera Dragon further increases add "s" Dynamax Cannon's damage output, allowing Eternatus to menace key threats, as a +1 Tera Dragon Dynamax Cannon can 2HKO Tera Water Zygarde-C and space added at "Zygarde-Cand" OHKOes it prior to Power Contruct after a layer of Spikes damage. It can also 2HKOes Ho-Oh and OHKOes Marshadow with a +1 Tera Dragon Dynamax Cannon, and OHKOes defensive Arceus-Ground after Meteor Beam and Spikes damage after a layer of Spikes. Would be redundant at this point
• Tera Dragon also suppresses Eternatus's weaknesses associated with the Poison-type, letting it survive Primal Groudon's Precipice Blades add "s", Ultra Necrozma's Photon Geyser, and Arceus-Ground's Judgment.
• Tera Fire turns the table against Zacian-C, not only allowing Eternatus to survive any hits from it but also allowing Eternatus to OHKO Zacian-C with Fire Blast at +0. Tera Fire Eternatus also benefits from its new resistance to Fairy-type attacks to resist one hit from Geomancy Xerneas attempting to set up on it and KOes it. I'm unsure of this bit, as Xerneas lives from full a +1 Tera Fire Fire Blast after SR, would recommend another example if possible
• Meteor Beam Eternatus fits best on offensive teams that look for a mid- to late-game wallbreaker and cleaner with sufficient Speed to outrun common threats to offensive teams like unboosted Ultra Necrozma and Xerneas. Cleaners like Double Dance double dance Primal Groudon and Extreme Killer Arceus, as well as wallbreakers like offensive Calm Mind Primal Kyogre and Ultra Necrozma like the support of Eternatus chipping their shared checks like Primal Groudon, Ho-Oh, and Giratina-O.
• Sticky Web support from teammates like Smeargle, Shuckle, and Ribombee further increase Eternatus's ability to threaten common anti-offense builds like Choice Scarf Xerneas and Dragon Dance Ultra Necrozma, allowing it to outrun and remove both of them.
• Despite its natural advantage, Eternatus can struggle dealing with Geomancy Xerneas if it still has access to Terastallization. A solid check like Primal Groudon is useful in order to cover this possibility. You're yet to add here from the previous QC check the fact that Xerneas will OHKO with +2 Moonblast if Eternatus itself doesn't Terastallize

[SET CREDITS]
Written by:
https://www.smogon.com/forums/members/eledyr.415367/
Quality checked by:
https://www.smogon.com/forums/members/zrp200.327515/
https://www.smogon.com/forums/members/gangsta-spongebob.535530/
https://www.smogon.com/forums/members/bobsican.434487/
Grammar checked by:
https://www.smogon.com/forums/members/user4.104/

 

[Eledyr]

Discussed on Discord, this one's good to go.

GP Team

 

[Zrp200]

add
remove
comment

qc add

gp amcheck

[SET]
name: Meteor Beam
move 1: Meteor Beam
move 2: Dynamax Cannon
move 3: Sludge Bomb
move 4: Flamethrower / Fire Blast
item: Power Herb
ability: Pressure
nature: Timid
evs: 252 SpA / 4 SpD / 252 Spe
tera type: Dragon / Fire

[SET COMMENTS]

• Meteor Beam Eternatus is a very potent threat which that fully exploits its offensive potential while keeping some of its good defensive traits give examples of defensive traits.
• Not only that does Meteor Beam boosts Eternatus's already good Special Attack, it also lures in and removes Ho-Oh and deals while dealing great damage to targets that are weak to its attacks (RC) such as Yveltal, Primal Groudon, and Primal Kyogre the examples add meaning to the phrase.
• Dynamax Cannon is the premier STAB move choice for Eternatus, and it's preferred over Draco Meteor or and Dragon Pulse it's preferred over both, not one because despite its low PP, it has a high base damage and no drawbacks damage, (AC) no drawbacks, (AC) and it keeps key KOs. For example, after a Meteor Beam boost, Eternatus can 2HKO specially defensive Primal Groudon with Dynamax Cannon (RC) as well as 2HKO Primal Kyogre with the move needed qualifier after Stealth Rock damage.
• Power Herb is required to make Meteor Beam a single turn based turn-based attack. This also means that Meteor Beam Eternatus will generally get a single opportunity to set up and make progress.
• Sludge Bomb is important to remove Fairy-types like Xerneas and Arceus-Fairy, which can otherwise easily survive to what Eternatus throws at them and use it as setup fodder. Spreading poisoning with this move is also useful to hinder some of its soft checks, (AC) key phrase: 'some of' like Primal Kyogre, Arceus-Ground, and Ho-Oh.
• Flamethrower covers Steel-types like Necrozma-DM, which takes pitiful damages damage from Dynamax Cannon and Meteor Beam and can force Eternatus out by setting up with Dragon Dance, or cripple or crippling it with Thunder Wave. Fire Blast can used for its higher base power in order to take out defensive Necrozma-DM as well as Zacian-C at +1.
• A Timid nature is crucial in order to outrun unboosted this was in previous qc checks but not implemented Ultra Necrozma and certain threats like Arceus, Mega Salamence, and Marshadow. It also Speed ties with opposing offensive Eternatus.
• Tera Dragon further increases Dynamax increases Dynamax Cannon's damage output, allowing Eternatus to menace key threats:, as a (add colon) +1 Tera Dragon Dynamax Cannon can 2HKO Tera Water Zygarde-C and OHKOes can OHKO parallelism it prior to Power Construct after a layer of Spikes. It also 2HKOes Ho-Oh and OHKOes Marshadow with a +1 Tera Dragon Dynamax Cannon 'It' refers to '+1 Tera Dragon Dynamax Cannon' already, and it additionally OHKOes defensive Arceus-Ground after a layer of Spikes.
• Tera Dragon also suppresses Eternatus's weaknesses associated with the Poison-type Poison type, letting it Eternatus unclear subject survive Primal Groudon's Precipice Blades, Ultra Necrozma's Photon Geyser, and Arceus-Ground's Judgment.
• Tera Fire turns the tables against Zacian-C, not only allowing Eternatus to not only survive any hits from it but also allowing Eternatus to OHKO Zacian-C with Fire Blast at +0. Tera Fire Eternatus can also benefit from its new resistance to Fairy-type attacks to resist serve as a check in a pinch to Geomancy Xerneas and Calm Mind Arceus-Fairy (RC) and revenge kill them.
• Meteor Beam Eternatus fits best on offensive teams that look are looking for a mid- to late-game wallbreaker and cleaner with sufficient Speed to outrun common threats to offensive teams like unboosted Ultra Necrozma and Xerneas. Cleaners like double dance Primal Groudon and Extreme Killer Arceus (RC) as well as wallbreakers like offensive Calm Mind Primal Kyogre and Ultra Necrozma like the support of Eternatus chipping their shared checks like Primal Groudon, Ho-Oh, and Giratina-O.
• Sticky Web support from teammates like Smeargle, Shuckle, and Ribombee further increase Eternatus's ability to threaten common anti-offense builds like Choice Scarf Xerneas and Dragon Dance Ultra Necrozma, allowing it to outrun and remove both of them.
• Despite its natural advantage, Eternatus can struggle in dealing with Geomancy Xerneas if it still has access to Terastallization, and Tera Dragon Eternatus is OHKO OHKOed by Moonblast. A solid check like Primal Groudon is useful in order to cover this possibility.

[SET CREDITS]
Written by:
https://www.smogon.com/forums/members/eledyr.415367/
Quality checked by:
https://www.smogon.com/forums/members/zrp200.327515/
https://www.smogon.com/forums/members/gangsta-spongebob.535530/
https://www.smogon.com/forums/members/bobsican.434487/
Grammar checked by:
https://www.smogon.com/forums/members/user4.104/

edit: fixed colors

 

[Clouds]

add / remove / comment

1/1

[SET]
name: Meteor Beam
move 1: Meteor Beam
move 2: Dynamax Cannon
move 3: Sludge Bomb
move 4: Flamethrower / Fire Blast
item: Power Herb
ability: Pressure
nature: Timid
evs: 252 SpA / 4 SpD / 252 Spe
tera type: Dragon / Fire

[SET COMMENTS]

• Meteor Beam Eternatus is a very potent threat that fully exploits its offensive potential while keeping some of its good defensive traits thanks to its Poison-type Poison typing, allowing Eternatus which allows it to come in and absorb Toxic Spikes and Toxic.
• Not only does Meteor Beam boost Eternatus's already good Special Attack, it also lures in and removes Ho-Oh while dealing great damage to targets that are weak to its attacks (phrasing makes it appear as if the latter two are weak to Eternatus's attacks) such as Yveltal, Primal Groudon, and Primal Kyogre.
• Dynamax Cannon is the premier STAB move of choice for Eternatus, and it's preferred over Draco Meteor and Dragon Pulse because despite its low PP, it has a high base damage high Base Power, (-comma) and no drawbacks, and it also keeps key KOs. For example, after a Meteor Beam boost, Eternatus can 2HKO specially defensive Primal Groudon with Dynamax Cannon as well as 2HKO Primal Kyogre with the move after Stealth Rock damage.
• Power Herb is required to make Meteor Beam a single turn-based single-turn attack. This also means that Meteor Beam Eternatus will generally get a single opportunity to set up and make progress.
• Sludge Bomb is important to remove Fairy-types like Xerneas and Arceus-Fairy, which can otherwise easily survive what Eternatus throws at them and use it as setup fodder. Spreading poisoning with this move is also useful to hinder some of its soft checks, like Primal Kyogre, Arceus-Ground, and Ho-Oh.
• Flamethrower covers Steel-types like Necrozma-DM, which takes pitiful damage from Dynamax Cannon and Meteor Beam and can force Eternatus out by setting up with Dragon Dance or crippling cripple (initial phrasing was fine here as long as comma was removed, unless you want to also imply that Thunder Wave forces Eternatus out in this situation; if so, you can keep it as "crippling") it with Thunder Wave. Fire Blast can be used for its higher Base Power in order to take out defensive Necrozma-DM as well as Zacian-C at +1.
• A Timid nature is crucial in order to outrun unboosted Ultra Necrozma and certain threats like Arceus, Mega Salamence, and Marshadow. It also Speed ties with opposing offensive Eternatus.
• Tera Dragon further increases Dynamax Cannon's damage output, allowing Eternatus to menace key threats:. (-colon, +period) For example, +1 Tera Dragon Dynamax Cannon can 2HKO Tera Water Zygarde-C and can OHKO it prior to Power Construct after a layer of Spikes. It also 2HKOes Ho-Oh and OHKOes Marshadow, and it additionally OHKOes defensive Arceus-Ground after a layer of Spikes.
• Tera Dragon also suppresses Eternatus's weaknesses associated with the Poison type its Poison typing, letting Eternatus survive Primal Groudon's Precipice Blades, Ultra Necrozma's Photon Geyser, and Arceus-Ground's Judgment.
• Tera Fire turns the tables against Zacian-C, allowing Eternatus to not only survive any hits from it but also OHKO Zacian-C with Fire Blast at +0 without a boost. Tera Fire Eternatus can also benefit from its new resistance to Fairy-type attacks to serve as a check in a pinch to Geomancy Xerneas and Calm Mind Arceus-Fairy and revenge kill them.
• Meteor Beam Eternatus fits best on offensive teams that are looking for a mid- to late-game wallbreaker and cleaner with sufficient Speed to outrun common threats to offensive teams like unboosted Ultra Necrozma and Xerneas. Cleaners like Double Dance Primal Groudon and Extreme Killer Arceus as well as wallbreakers like offensive Calm Mind Primal Kyogre and Ultra Necrozma like appreciate (repetition) the support of Eternatus chipping their shared checks like Primal Groudon, Ho-Oh, and Giratina-O.
• Sticky Web support from teammates like Smeargle, Shuckle, and Ribombee further increases Eternatus's ability to threaten common anti-offense builds like Choice Scarf Xerneas and Dragon Dance Ultra Necrozma, allowing it to outrun and remove both of them.
• Despite its natural advantage, Eternatus can struggle in dealing with Geomancy Xerneas if it still has access to Terastallization, and Tera Dragon Eternatus is OHKOed by Moonblast. A solid check like Primal Groudon is useful in order to cover this possibility.

[SET CREDITS]
Written by:
https://www.smogon.com/forums/members/eledyr.415367/
Quality checked by:
https://www.smogon.com/forums/members/zrp200.327515/
https://www.smogon.com/forums/members/gangsta-spongebob.535530/
https://www.smogon.com/forums/members/bobsican.434487/
Grammar checked by:
https://www.smogon.com/forums/members/clouds.356215/
https://www.smogon.com/forums/members/zrp200.327515/

credit myself and Zrp200, GP Team done

 

[Sulo]

https://www.smogon.com/dex/sv/pokemon/eternatus/national-dex-ubers/