From Dragon Ball Encyclopedia, the ''Dragon Ball'' wiki
Nappa holds his hand out and charges a fierce pulsating white sphere of energy in his hand. He then reels back when he is ready and tosses a large, pure white (golden when using his Lightning Aura) energy sphere at his opponent, creating an enormous explosion on contact.
Dragon Ball Z
On Earth, Nappa used this attack against Kuririn in revenge for having his face scarred by Kuririn's Destructo Disk. Kuririn became injured by the attack, but Nappa was interrupted from launching a second one by Piccolo's Destructive Wind. Nappa used the Bomber DX again in an attempt to destoy Son Gohan, but ended up killing Piccolo instead when he jumped in the way of the blast. Nappa used it one last time with his Lightning Aura against Son Goku, who nullified the attack with only a scream.
Bomber DX is named in the Budokai video game series and is one of Nappa's attacks.
It is named Derakkusu Bonbā (デラックス ボンバー, Derakkusu Bonbā) in Dragon Ball Heroes.