There are 23 various games that can be played Before, During, or After each Basho.
Theres also a few sumo games/puzzles on the Internet you can play:
Keyboard Sumo: http://www.chthonic.f9.co.uk/sumo/ Kimarite Puzzle: http://www.geocities.com/cfinberg862/kimarite.html Sumo Big Puzzle: http://www.geocities.com/cfinberg862/SumoBigPuzzle.html
Keyboard Sumo: http://www.chthonic.f9.co.uk/sumo/
Kimarite Puzzle: http://www.geocities.com/cfinberg862/kimarite.html
Sumo Big Puzzle: http://www.geocities.com/cfinberg862/SumoBigPuzzle.html