From Dragon Ball Encyclopedia, the ''Dragon Ball'' wiki
Killa (キーラ, Kiira; FUNimation "Killa") is a large martial artist.
Killa participated in the Battle Royale at the end of the 25th Tenkaichi Tournament. He was quite petty, as he tried to conspire with Mighty Mask in order to beat Mister Satan. He was eventually defeated by Mighty Mask, who secretly was Son Goten and Trunks Brief in disguise. His role was minimal in the manga, but in the anime he had some plot-developing flashbacks involving Spopovich in which he lost in the second round of the 24th Tenkaichi Tournament.
 Video games
Killa appeared in Dragon Ball Z: Buu's Fury.