What are some of your 4 player experiences on the Wii? Retail or WiiWare, it doesn't matter. Just note if the game requires other attachments as.
HIVE JUMP is a sci-fi action platformer for 1- 4 players blending run 'n gun gameplay with roguelike elements. The Wii U version will feature amiibo support.
This page contains a list of co-op games for the Wii. You'll find all of the Find out the number of co-op players supported and check out ratings of co-op games.