Regarding the things up for quickban I wanted to give my thoughts:
Tatsugiri:
My opinion on this has done a 180 since the last slate where we were mostly seeing gimmicky teams using this, with a lvl 1 Tatsugiri and a Flamigo to copy the boosts. Those teams were trying to win with just the Dondozo, and if you stopped the gimmick then you won. I thought that was the limit of it, that it would just be a simple gimmick, a la beat up + justified.
However, since then we’ve seen developments that show how uncompetitive the gimmick is. You can simply plug the two around a decent core of other Pokémon, and when the timing is right (once you’ve weakened/eliminated their counter play) then you double switch into the two. When Dondozo is max bulk with rest talk and Tera Steel to prevent clear smog, the only reliable counterplay is haze. You can try to force it to Tera and then have something that is good against steels come in, but that requires such precise positioning that it’s almost impossible when being played against quality teams that can wear down/eliminate these Pokémon. Alongside this, Tatsugiri boasts a formidable 120 special attack, so a specs or scarf set is viable, meaning that when if you finally defeat Dondozo, there is still the Tatsugiri to be dealt with.
It’s uncompetitive and forces teams to run one of three viable haze mons, which is forcing the meta into a Murkrow offense is the main team you see metagame. This is because Murkrow is the best haze user, and so teams are forced to incorporate it, and then they just build around prankster tailwind. I think with Tatsugiri banned, there will be more teambuilding options available. I’ll be voting ban.
A good replay to showcase what I mean
https://replay.pokemonshowdown.com/gen9doublesou-1738423975-4svze0uw73e8y8zo49kbfn5d6riv90epw
Flutter Mane
On the other hand, I think Flutter Mane is simply a strong Pokémon, and would be better off if suspected. Flutter has its drawbacks (mainly it’s terrible physical defense) that limit it and sufficient counter play exists. Flutter Manes fall into three categories:
1. Max speed max spa timid booster energy (fast and frail)
2. Bulky but still with booster energy timid (bulky)
3. Modest that either runs a LO/specs or booster energy (hard hitting)
Fast and frail is susceptible to priority attacks, as well as it doesn’t hit unbelievably hard. Bulky hits even less hard, but may survive some attacks. Hard hitting does provide more offense, but isn’t as fast that it outspeeds scarfers, so it requires speed control.
I’ve found through calcing that there is a lot of Pokémon that can be EV’d that either outspeeds the non-speed boosting versions (via its own booster energy or scarf) or lives attacks from the speed boosting version, and can ohko it back. This means that whatever version of Flutter you play, these mons can beat it. Similarly, many strong physical attackers can be assault vested to just take a hit from it and ko it back. This isn’t even considering the prospect of Tera-typing your Pokémon to beat it.
Replays:
https://replay.pokemonshowdown.com/gen9doublesou-1736999099-cvocgxfn2tppk5psbaxcx48kd4pxsxwpw
https://replay.pokemonshowdown.com/smogtours-gen9doublesou-664285