So after 2 full boxes, I have in my possesion a perfect IV'd Froakie that has protean.

My only question is...now what?

I know what protean DOES, but I don't know how use it effectivley in battle.

How does one build a protean froakie moveset wise and EV wise? How would I use one effectively in battle?

Thanks. Sorry for the probably obvious question. I'm kinda new to competitive pokemon.