Dragon Ball Z: Budokai Tenkaichi 3 Tips

Defeating Baby in Dragon History
When you start, you will be in the normal stage. Keep your distance. When he gets close, do a normal combo ending with a bashing attack. This should send him flying. If not, keep going until it does. When the "R3" symbol appears, use it as quickly as possible. Goku should turn into a Super Saiyan 3. Repeat the same strategy because your health is very limited. After awhile the "R3" symbol will reappear; press it quickly. Majuub should come in. This is your chance to do a little damage while switching back and forth using the strategy done with Goku, and just doing combos on him. When the "R3" symbol appears, use it. When SS4 Goku comes in, try to take him out at that point.