Chansey @ Eviolite
Ability: Natural Cure
Shiny: Yes
EVs: 248 HP / 252 Def / 8 SpD
Relaxed Nature
IVs: 0 Spe
- U-turn
- Soft-Boiled
- Wish
- Heal Bell
Gardevoir (F) @ Gardevoirite
Ability: Trace
Shiny: Yes
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Toxic Spikes
- Hyper Voice
- Encore
- Psyshock
Ditto @ Choice Scarf
Ability: Imposter
Shiny: Yes
Happiness: 128
EVs: 252 HP / 4 SpA / 252 Spe
Timid Nature
IVs: 30 Atk / 30 Def
- Transform
- Skill Swap
Landorus-Therian @ Safety Goggles
Ability: Intimidate
Shiny: Yes
EVs: 248 HP / 8 Atk / 252 Def
Impish Nature
IVs: 29 Spe
- Milk Drink
- Stealth Rock
- U-turn
- Earthquake
Heatran (F) @ Air Balloon
Ability: Flash Fire
Shiny: Yes
EVs: 252 SpA / 4 SpD / 252 Spe
Modest Nature
- Shell Smash
- Flamethrower
- Earth Power
- Protect
Terrakion @ White Herb
Ability: Justified
Shiny: Yes
Happiness: 0
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Shift Gear
- Close Combat
- Stone Edge
- Substitute
Ability: Natural Cure
Shiny: Yes
EVs: 248 HP / 252 Def / 8 SpD
Relaxed Nature
IVs: 0 Spe
- U-turn
- Soft-Boiled
- Wish
- Heal Bell
Gardevoir (F) @ Gardevoirite
Ability: Trace
Shiny: Yes
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Toxic Spikes
- Hyper Voice
- Encore
- Psyshock
Ditto @ Choice Scarf
Ability: Imposter
Shiny: Yes
Happiness: 128
EVs: 252 HP / 4 SpA / 252 Spe
Timid Nature
IVs: 30 Atk / 30 Def
- Transform
- Skill Swap
Landorus-Therian @ Safety Goggles
Ability: Intimidate
Shiny: Yes
EVs: 248 HP / 8 Atk / 252 Def
Impish Nature
IVs: 29 Spe
- Milk Drink
- Stealth Rock
- U-turn
- Earthquake
Heatran (F) @ Air Balloon
Ability: Flash Fire
Shiny: Yes
EVs: 252 SpA / 4 SpD / 252 Spe
Modest Nature
- Shell Smash
- Flamethrower
- Earth Power
- Protect
Terrakion @ White Herb
Ability: Justified
Shiny: Yes
Happiness: 0
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Shift Gear
- Close Combat
- Stone Edge
- Substitute
It's basically a balance team that makes use of Mega Gardevoir to set up Toxic Spikes, since all Magic Bouncers lose 1v1 to it. Encore lets you lock walls into Recover or Defog, letting you switch in something else to set up or just waste their PP while spamming attacks.
U-turn Chansey is nice because it makes it easy to pass Wishes to teammates or switch into Ditto on things like set up Heatran or Thundurus.
Scarf Ditto is my main check to most sweepers, and it's IV'd to have Hidden Power Ice.
Shell Smash Heatran is a great sweeper, and Air Balloon lets you check and set up on things like Excadrill, Landorus or opposing Heatran. I chose Protect over more coverage because I often find myself stalling for Toxic Spikes damage against things like Keldeo, which a boosted Earth Power can KO afterwards.
Terrakion is a pretty simple set up sweeper. I chose it because it forces out many of the things Heatran and Gardevoir have trouble with like Chansey. White Herb is mainly for Intimidate but it also prevents Talonflame from revenging it after a Close Combat.