That's a very nice team, dude! E você ainda é brasileiro! Que nem eu :) hahahaha, anyway, I'll write in English for the sake of the community. Anyways, the only things that is bothering me a little is Volbeat. recently I've been using a set in every tier I try to play and been having a lot of success! This set is a Liepard one!
Giovanni (Liepard) (M) @ Focus Sash
EVs: 4 HP / 252 SAtk / 252 Spd
- Thunder Wave
- Dark Pulse
I always lead with it, and normally use taunt on the first turn. Then I yawn no matter what, this way it's sure it's sure I can get a free switch, for you this means you can set up a rain dance with any other poke. If you want LIepard can also learn Rain dance. Also, this is a nice counter to shedinja, since you said it's posing a lot of problem. If it really bothers you, you can change Dark Pulse to pursuit. Anyway, that's just an advice and my opinion. Anyway, awesome team. É muito bom ver brasileiros jogando competitivamente! Parabéns aí e boa sorte!