Nappa

"I'll do what you did to me, Vegeta!" — Nappa before performing a Nappa Cannon on Vegeta

Nappa (ナッパ) appears in: Dragon Ball Z, Dragon Ball GT, Dragon Ball Z Kai & Dragon Ball Z: Evil Reborn

Pre-Evil Reborn
Nappa assisted Vegeta in attacking the Z-Fighters Just as Nappa is about to finish off the exhausted Gohan by stepping on him, Goku arrives, with the Nimbus carrying Gohan. Nappa claims Goku would not have a chance of beating him, and even after Vegeta reads his power level, Nappa attacks Goku, but Goku easily dodges his punch. Their fight carries on, Goku seemingly dominating the battle. At Vegeta's insistence, Nappa eventually calms down and begins to attack with much better technique, but he still hopelessly outmatched. Desperate, he fires his ultimate attack, which Goku effortlessly counters, stunning Nappa. When Vegeta loses patience with Nappa and orders him to stand down, Nappa decides to take the humiliation out on Gohan and Krillin, charging at them with the intention of finishing them off with his Break Cannon mouth blast. Goku had to use his Kaioken to stop him and attacks Nappa with the Kaioken Finish to his back, breaking it.

Evil Reborn
In Dragon Ball Z: Evil Reborn, Nappa assists Raditz in defeating the Z-Fighters in similar fashion to the Saiyan Saga but Nappa eventually goes Super Saiyan 4 but he is still easily defeated along with Raditz.