Team Rocket has no business being in this episode, but I have a feeling they are probably the ones behind the shopping mall blackout. It sounds like something they would cause as part of a scheme to kidnap Pokémon. >_> Hopefully, their appearance, if any, in this episode is very minor, because I hate it when they steal the spotlight just for the sake of being needed villains.
I don't think Mimikyu will be a lone wolf anymore, not since Jessie caught it (albeit using James's Luxury Ball). However, since Mimikyu was caught unwillingly, I want Jessie to have to earn its respect. It may have listened to her in the battle against Pikachu, but that's because it was against Pikachu. I want Mimikyu to be less inclined to listen to Jessie or help the TRio when Pikachu is not involved.