Dragon Ball Z: Goku Hishouden/Piccolo

After defeating the other opponents in the World Martial Arts Tournament, you'll move on to verse Piccolo. Don't worry though--this isn't the evil King Piccolo; this is just Piccolo Jr., trusted ally of Goku. It's impossible to have more Ki and HP than him at this point, so it's probably noticeable that the battles are starting to get harder. Prepare for a long battle.

The Battle
Piccolo's favorite moves would probably be Ki attacks. Don't get intimidated and block whatever you can. If you don't successfully block, you shouldn't worry. Your HP should still be 500 by this point. Try using Ki physical attacks, like the throw and the headbutt. Ki blasts might work too, if he doesn't block them. It may seem hard to get a successful hit, but keep hammering at him with the same move and two out of the four probably won't be blocked. Don't use a Kamehameha until he loses around 100 HP. If you don't use it when he's weaker, he'll probably block it, thus wasting your Ki. It's best to start with physical attacks then things like Ki blasts. Also, don't get too risky with the movements. If you move closer to him to give him more damage in one move, move back after landing your move. This way, when he attacks and if you don't successfully block or dodge his attack, you'll get more damage as well.