I've been experimenting with so many different Pokémon on Showdown. It wasn't going well for a while. Some Pokémon that tried (and failed) to be on my team: Braviary, Smeargle, Toucanon, Komala, Stoutland, and Porygon2 (who usually does well for me).
These Pokémon are for sure on my team by now:
Porygon-Z (My star player)
Drampa (super underrated Pokémon, as I've recently discovered)
Ditto (to spite and punish anyone for setting up on me)
Bewear (Wow that thing can take non-STAB fighting hits well...)
The 5th member is currently teetering between Blissey and a utility Staraptor. Blissey (or Chansey) might seem like a better choice, but this Staraptor set is working surprisingly well. It just might stay.
My wild card Pokémon is Mimikyu, because it's trying to appear "normal," and it's typing combats Fighting and Dragon types so well. Unfortunately it's really been falling flat...the metagame is just so dominated by Steel types and it has nothing to deal with those, even with a Weakness Policy. Once bank comes out, I'll probably switch it out for Assault Vest Kecleon. That's always worked well, and it's kind of my signature at this point