Lothor

Lothor is a villian from "Power Rangers: Ninja Storm" who was banished to the Abyss of Evil But, returns in the crossover of Dino Thunder/Ninja Storm called "Thunder Storm" and was shrunken down by Mesogog and kept him in a bottle to emulate his victory, it was unknown what happened to him after Mesogog was defeated But, he was most likely put in the Abyss of Evil.

He returns and wreaks havok to lure out the Ninja Storm rangers But, instead faces the Ninja Fighters who are forced to flee after realizing that he's too powerful and afterwards, he devises a partnership with the Dark Lord who he promises that he won't betray him, like Mesogog did.

Afterwards, Pz314 and Pz715 creates a machine that would monsters from the Abyss of Evil to Earth in order to take it over and it works However, the Ninja Fighters caught wind of this after Choboo tells them about the machine.

Once they get inside the Black Prymaid, they are greeted by the Dark Lord whose surprised they've made it this far and gets Pz715 to crush them But, Josh tries to take down 715 while they disarm the machine However, Lothor shocks Cameron to death until the Dark Lord declares their partnership is over and they attack each other and the Dark Lord wins.

Trivia

 * When Lothor mentions how he has been betrayed before, as he was betrayed by Mesogog But, the only reason he was betrayed by Mesogog was because he was gonna do it anyway even if it was a success as with the Dark Lord he betrayed him since he wanted the Ninja Fighters to see their world's destruction But, not dead so, he rided Lothor of Earth permanently.