Hi, and welcome to PC!
I am ~Night and I am a spriter for Pokemon Infinite Rainbow. I see that you're interested in spriting for the game. Unfortunately, PokemonOI won't be on PC for a while, so he can't say whether or not he wants you to be a spriter. Maybe you could PM me some examples of sprites to see if I would want to recomend your joining the team to him? Then your chances of being a spriter for him might be greater.
~Night