Was Nappa paralyzed?

Yes, Nappa was paralyzed, but it happened during a pivotal moment in Dragon Ball Z. In the Saiyan Saga, after Nappa and Vegeta arrived on Earth and began their destructive rampage, Nappa fought against the Z Fighters, including Goku, Piccolo, and the others.

During the battle, Nappa was facing off against Goku. After a brutal fight, Goku was able to survive thanks to his training, but it was during the fight that Goku demonstrated his increased strength and abilities. However, the most significant moment for Nappa's paralysis comes after his brutal defeat by Goku and his actions that led to his end.

When Nappa is finally confronted by Vegeta, after causing the deaths of several of the Z Fighters, Vegeta becomes frustrated with Nappa's failures and orders him to step aside. In an act of mercy, Vegeta then uses his energy to mercilessly blast Nappa, leaving him severely injured and paralyzed. This act rendered Nappa unable to move, and after that, he was left to be dealt with in his incapacitated state.

Nappa's injury ultimately led to his death when Vegeta discarded him, and Nappa's body was then left behind as Vegeta flew off. Thus, yes, Nappa was paralyzed as a result of Vegeta's blast, marking a tragic end to his once-unstoppable strength.