Twitch Pokemon is meant to be an AFK game for people to play while they are playing another game or working on their computer. Raids last typically 5 minutes, so the user can join every 5 minutes to gain levels. Pokemon gains one level per raid. Leaderboard can be shown upon request.
Currently, the only available Pokemon are Bulbasaur, Charmander, Squirtle, Pichu, Chikorita, Cyndaquil, Totodile, Treecko, Torchic, Mudkip, Turtwig, Chimchar, Piplup, Snivy, Tepig, Oshawott, Chespin, Fennekin, and Froakie.
That's about it! Feel free to ask more questions or give feedback. Whisper me if I am AFK, or ask your question and let me whisper you when I come back!