Ok. I don't have a reason for captivate.
Zekrom is physical and Reshiram is Special.
Maybe you can change there movesets and maybe levels so it can be fair, to this
Zekrom: Fusion Bolt ,Dragon Claw ,Zen Headbutt ,Thunder Fang
Reshiram: Fusion Flare ,Dragon Pulse , Extrasensory, Flamethrower