Another Ninja Pokémon story idea thingy that came to mind today out of boredom. XD.
The plots simple: A rival ninja killed Thunder's entire Clan, and he wanted revenge. He ran into the old Ninetails, Render, who became like a father to him. Render taught Thunder that in order to truly avenge his Clan, he must honorably fight for what is right, not fight for revenge. In training the young Chu in the Ninja arts, he teaches him also control, and the Ninja way. Soon after he takes Thunder as his student, a threat is issued by the same ninja who slaughtered his Clan. When his sensei is injured in battle against Ripper, the leader of the Claw Ninja Clan, it's up to Thunder to stop the Claw once and for all!
And we can mix Dragon Ball Z in it too, 'cause yolo. XD.