Dragon Ball Z: Goku Hishouden/Nappa

Nappa is Vegeta's right-hand man and partner along with Raditz. The last battle before the final battle, the battle against Nappa isn't an easy one. Most likely, it'll take a few tries to get it mastered. This is also a good warm-up for the final battle. If you can't defeat Nappa, then you can't defeat Vegeta.