Vexacus

Vexacus is a shark-themed bounty hunter and a rival and "sworn enemy" of Lothor. He wields a sword and a fan blade, and can summon a giant "land shark".

Biography
Vexacus first comes to Earth hunting an alien - a Karminian - who can give her powers to someone when she dies. He fails in his attempt to capture these powers, and ends up stranded when his ship is shot down.

Vexacus becomes Lothor's head general, and often clashes with Zurgane. He and Shimazu later plotted to defeat Lothor and Zurgane and take over their forces

This advances to a point where, after Zurgane's Hyper Zurganezord is destroyed, Vexacus wipes him out. He later does the same to Motodrone when he threatens to reveal his plans, and plans to do it to Shimazu, until Shimazu is killed before he got the chance, but is later stabbed in the back by Marah and Kapri, who arrange for his destruction at the hands of the Rangers and over heard his plans. He returns again after the Abyss is opened, but is quickly defeated by Shane.

Alternate Vexacus
An alternate dimension has Vexacus as a good guy. He is among those who help Mayor Lothor fight the Evil Ninja Rangers.