Well, I doubt Bowtie and James would let Mike carry two Type:Null eith him even if he's not using the second one.

On a separate note, Just a refresher too, Hibiki and Zerina stats will rival that of at least a high-mid legendary. She does not have the power of Gods like Palkia, Dialga, Giratina, Arceus, Groudon, Kyogre and Rayquaza but can rival that of Regigigas and Mewtwo. Her starts are more askin toward Physical attacks while Zerina is more Special based.

If Bowtie and James are ok with it, Chuck best bet is to travel to Ather to talk to Veronica where he can also obtain the final type:Null from Wicke.