Well, while we don't have any confirmation about the Steelix being our good friend Onix who has been around since Episode 5, there's more evidence for it than against it at this point. That said, I would rather Geodude have evolved, due to Steelix being so over-showcased ever since Olivine Gym. And Charizard...speaking of over-showcased. Looks as though Mizuho gave the gym a flowery overhaul. Wonder if we'll get to see her battle in this. If TR are the opponents, I wonder where they obtained the Pokemon and how they got them under their control.
And yeah, animation roxxors in this.
Oh, and if there was still any doubt about TR separating in the previous episode, this debunks all theories.