Masteroids is a multiplayer asteroids clone. Up to 4 players can play simultaneously in co-op or competitive mode.

Release notes:

2008/06/09 – Version 0.4 is out. Grab it whilst it’s hot. New features can be found in the Readme along with a description of control layouts. Main improvements include Nunchuk and Classic Control support!

http://wiibrew.org/wiki/Homebrew_apps/Masteroids