My kids are way into Pokemon so I wasn’t shocked when that’s the type of party my older one wanted.
I sent out Poke ball invitations with a pop up Pikachu inside.
There was a ‘Hit Team Rocket’ game where the kids got to fire nerf suction cup darts at a picture of Team Rocket (I put transparency circles on the targets so they would stick better), we had a bean bag toss with crocheted poke balls as the ‘bean bags’ and there was a Pikachu Pinata of course. We also play Pokemon Bingo.
The pokeball crochet pattern came from http://wolfdreamer-oth.blogspot.com/2009/04/pokeball.html. She has some awesome patterns for everything from Mario to Pokemon and gives most of them away for free.
Kids helped color the Poke Ball Toss.