OK, throwing my hat in the ring for my beloved poison types.
first off, this is a very good dlc for poison. Getting our first legendary trio and galar wheezings grand return are really good signs. Let's see how they measure up against their competition.
First up, Gheezing Vs Glummora. Both serve the very niche of hazard removal but take it two different ways, Wheezing with bulk and defog and Glummora with speed, power and mortal spin. While I will say removing one set of hazards while poisoning is very useful, the rest of our precious little rocks build works against it. It's poor bulk means it's hard to safely swap in, toxic debris is nice, but only works on physical moves and cha lucky if they actually survive. Gheezing is a defensive tank, self healing and has two vital immunitys. there is no feeling as sweet as swapping into a Draco meteor or an earthquake and seeing it do literally nothing. Amoonguss might have been our best defence before, but he appreciates someone who can take the strain off his back. This spot belongs to Gheezing, no doubt. Don't worry though Glimmora, I've always said cfd
ha were a better offensive Mon, maybe this will give cha a chance to shine properly, especially with the threat of corrosive Toxic.
This neatly takes us into the poison fairy round. I've already talked about wheezing once so here's Fezandipiti. I'm not gonna lie, when I first saw him I was hyped "oh boy, a legendary, looks like a poison flying type, I bet that's why they didn't include crobat or wheezing. I bet it will learn defog, finally a ground immune hazard removal with roost probably. oh, toxic chain is awesome, I can't wait to see a toxic threatening u-turner”. let's just say I was consoled when I found out galar Gheezing was returning after all (all the leaks I had seen said wheezing not galar). To be fair, he is good, nice offensive typing, decent stats and movepool, two good abilities in toxic chain and technician, I can see this bird making moves. But if cha read my previous sentence cha can guess how this coins gonna drop. Gheezing does more for poison on a mono team, but I imagine Fezandipiti will be more at home in a standard team, can't say what tier but he will be something to watch out for.
Now for the reverse reaction. Okidogi was the guy I was least excited about on release. However, when I actually saw it's stats and moves then it's actually got some potential. It's rival sneasler is a great team member, and these two go day and night in their approaches. Sneasler is fast, hits hard, has crazy status potential but ain't taking a counterblow at all. Okidogi on the other hand, he may be slow, but he'll take anything cha can throw and hit back harder. He actually has potential as a good lead, he has taunt and the bulk to use it, his alternative ability guard dog shuts down intimate plays and escape button shenanigans, alternatively a knock off that threatens to toxic is something that we will all come to fear, drain punch for recovery then either bulk up for set up or a wide selection of moves (admittedly not the greatest options, but some high power moves like superpower or counter) for the last slot. They are surprisingly closely matched, and it's going to be interesting to see who ends up on top.
Finally the middle child Monkidori. I've never had strong feelings for or against him. Poison/psychic is a decent offensive/defensive type, his stats make him an ok sweeping option. Too bad his competition is one of the best poison types ever made. Glowking has better offensive and defensive stats, regenerate is amazing recovery, I'm sorry monkey boy but it's no contest. I'm sure cha will find a niche, but I don't think cha OU material.
Notable other mentions. Arbok gets some nice options, I don't think he'll make monotype but I'm sure lower tries will be swept by him. Dragle getting scald is good, but he does better as dragon utilities that poison power.
Let me know cha thoughts and if I missed anything.