Skuntank needed to find a way to open up a spot in the guild... So, he opts to just make one of the teams disappear, thus giving Team Skull a place in the guild!
Don't ask where Team Chump went. They've evolved to Team Pudge~

My 12th pokemon in the lineup, Skuntank! I am continuing to use this new shading method that I found like in my previous Mew picture, and I was told it looks better, so I'm going to keep trying to use it!