So it looks like neither Iwane or Tamagawa's animating this two-parter. :-(
I don't recognize Tatsuya Annoura either, has s/he animated Pocket Monsters in the past?
I could have sworn Iwane was directing this episode. Well, he can still provide some key animation.
Annoura was key animator in several episodes and movies, but this is the first one she/he (I believe is a he) directs.