Dragon Ball Z: Budokai Codes -

Taunts:
Taunting (press P + K + G + E) will lower your opponent's Ki gauge by 1.

Easier combos:
If you are doing a combo that your having trouble with (for example, the Super Kamahamaha (K(x2), + K, K, E), hold the and press the rest of the moves and it will put in the arrows. For example, hold and press K(x2), K(x2), E.