Personally have this game thinks its excellent the kids love Dragonball, DragonballZ & Dragonball GT - so this is a perfect game for them with all the characters from their favourite anime! Gets a score of 6.5 so not bad, not many great fighting games for the Wii (bar MKA of-course!!!).
Review here: http://uk.gamespot.com/wii/action/dragonballzbudokaitenkaichi2/index.html
Info from the play website:
Dragonball Z Budokai Tenkaichi 2 strays from the conventional fighting game format in favour of a third-person perspective and more-free-roaming action with a wealth of playable characters all but ensures that this game will get its hooks into fans eager to fight as their favorite Dragon Ball Z and Dragon Ball GT characters!