but there is a cool thing in tenkaichi thats not in budokai 3 well 2 things
1.you can use a one move finisher (square 1-4 times then X over and over you will get 99 hits and win if your opponet dont block)
2.also you can charge up when in the beam thing by hitting L2 like Cell did when he was facing gohan he charged and made it stronger