Hello mon review

Three typings is cool. It serves as great insurance for Ground types in the future, and has a somewhat decent matchup with the current Ground in the tier. It's main utility is that of a Rapid Spinner that also blocks spin itself, all while having a great matchup with the other two spinners added. It's honestly pretty decent and I can see it aging well. Probably helps that the Garganacl item that gimps Ghosts for Rock types isn't liking a Water and Grass type that fucks it over.

Mega Blastoise is a strong asf Mega, complete with a decent SpA, great bulk, and a surprisingly great Speed tier of 98 (out speeds Samuraiai!). Mega Toise will most likely come out as a majorly influencial Pokémon for the foreseeable future, especially as Fighting and Dark type Pokémon becomes more prominent in the tier. As of right now though, it more or less single handly bricks the Three Dragon metagame that existed prior. All three of them had means to touch bypass it, but realistically none of them could ever 1v1 this. Great slot.

Another crazy good Fairy type submission, it technically has a worse matchup overall versus the Dragons since Dialga can hit it for SE damage, but otherwise it's insanely potent offensive glue for the metagame right now. It out speeds a vast majority of mons that are currently in the tier, it 1v1s basically everything that does out speed it and very little can reliably beat it without feeling explicitly broken. It feels like as of rn it could solidy it as the new S rank of the tier.

The metagame's first set up sweeper, that can Tera, and also more or less can Imposter proof itself. Gyarados will be a ferocious wincon to face, and I can see the possibility of it feeling somewhat problematic for a bit until more consistent defensive mons + revenge killers get introduced.

The first Fighting type so far, and it's one that doesn't even really lose to the myriad of Fairies introduced (depending on set). It is the worst at explicitly spinning out of the three spinners added, but it can do a good job at checking physical attackers and being an overall decent defensive pivot thanks to Intimidate, good bulk and good defensive typing.
Items are cool. Stellarium Z feels like a fun compromise for Z-Moves, and makes set up wallbreakers alot more interesting as to how they are checked, considering everything has a big universal unresisted, but not STAB boosted nuke. Garg Plush makes Rock types potentially great, and we have one rn that probably wants the extra bump. I don't have any idea what Utility Umbrella oughts to do.
With this slate we have 4 separate field effects to take advantage of - Extended Trick Room, Auto Gravity, Grassy Terrain and to a lesser extent Misty Terrain. I hope to see these get fleshed out as the metagame develops and see just what kind of metagame we can get when taking these team archtypes into account.