Skeltox is a skeleton-themed monster with a skeletal piranha for a left forearm and hand. He was sent by Prince Vekar to steal the energy from earthlings, which he would extract from them in the form of glowing skeletons.
Skeltox made his first appearance on the Armada Mothership where he was assigned by the prince to steal on the energy from the humans down on Planet Earth.
Speaking of which he appeared on a building's roof with a couple of X Borgs when he used his sword as a fishing rod to cast an energy line onto a couple of civilians making them very sleepy and tired. However his scheme has been notice by Jake and Orion as they morphed and battle the X Borgs and Skeltox. As this goes on the team showed up and joined the battle. After that he cast his line on the team stealing all of their energy making them feel sleepy too and left the area.
A while later he was at a parking lot being very happy that he got 4 of the rangers energy, but he was then ambushed by Jake and Orion. During the fight Jake kept Skeltox busy while Orion fused the power of the Sixth Ranger to access Gold Mode once that was done Orion battles Skeltox in this mode after that Skeltox was then defeated by this finisher called Legendary Final Strike causing all the energy that Skeltox stole was sent back to their owners.
However thanks to Levira he was then enlarged as he battles Legendary Megazord and the Q-Rex in its Dino mode once Skeltox's fish-like fist is destroyed the Q-Rex DinoZord then transformed into a Megazord as Skeltox battles it. After that Skeltox is then destroyed by this finisher called Triple Drill Attack.