Regarding Wondermons, here’s just a couple teams / samples:
https://pokepast.es/a4b16b87fd753349
Here is a standard team that focuses on setting up Stealth Rocks with Mold Breaker Excadrill. It also has both Rock Tomb and Bulldoze, for solid SE coverage and, in trade offs where Excadrill is slower, can then outspeed. HP Dark is there for the many Psychic types I believe will be usefull, but Toxic or another attack could work.
Sigiliph comes in on SR of the other team sets it up and can Defog. Protect is there to scout SE attacks, as well as have it safely get burned so it can Psycho Shift it to, say, Sturdy and non Magic Guard mons. Magic Coat is to deflect Taunts, Encores, or possible repeated statuses.
Clef is a great mon in the teir, which only realistically goes down to Steel and Posion attacks. It has fire, dark, and ice coverage, but it can pretty much run anything. Lastly, swagger can be used for Magic Guard mons or Sturdy mons to have a chance to hit themselves; a way to bypass both abilities if lucky.
Zam’s fast Taunt can prevent SR or Defogs, and then just relies on its Focus Sash and coverage to dish out attacks.
Toge can use spiky sheild for indirect damage, as well as for scouting. U turn and nuzzle both have their utility, and encore means it can safely switch in to an immunity and, as long as it’s faster, stay safe. Safety goggles prevent it going down to Hail, but lum berry can be good against burn.
Lastly, Espeon functions as a last line of defence, and threatens the opponent when going for their own hazzards or statuses. It is also a fast, all out attacker meant to fill offensive holes in the team.
https://pokepast.es/0aef15fe4e23757c
Here is a hail spam team. Instead of going for its on hazards or having good SE coverage, it tries to use hail as the main means of offense, with Skill Swap Jynx and Smoochum being the stars. They can swap abilites with Magic Guard users, and watch them go down to hail.
I believe there are still a ton of different strats and viable mons, and kind of reminds me of Suicide Cup in a way. If anything, I think that Hidden Power should be the first to be banned.