This is where you'll find all the dbz games.
:Gameboy Color :
Dragonball z Legendary Super Warriors
:Gameboy Advance:
Dragonball z collectible card game
Dragonball Z The legacy of Goku
Dragonball Z The legacy of Goku II
Dragonball Z Buu's FURY
Dragonball Z Taiketsu
Dragonball Gt:Transformation
Dragonball:Advanced Adventure
DragonBall Z Supersonic Warriors
:PS1:
Dragonball Z Ultimate Battle 22
DragonBall GT:Final Bout
:PS2/gamecube/wii:
DragonBall z Budokai
DragonBall Z Budokai 2
DBZ Budokai 3
DBZ Budokai Tenkaichi
DBZ Budokai Tenkaichi 2
DBZ Budokai Tenkaichi 3
DragonBall z Sagas
Battle Stadium D.O.N(Japan)
Super Dragon ball z
:PSP:
Dragonball z Shin Budokai
Dragonball Z Shin Budokai-Another Road
:DS:
DragonBall z Harukanaru Densetsu
Dragonball z Super Sonic Warriors 2
:Personal Computer:
Dragon Ball Online(Japan&SouthKorea)
Information from wikipedia and dragonballz.com