TR also seems to be in this episode.
Musashi, Kojiro, Nyasu and.... Seger. -_- I was hoping Sakaki would be in this and set up why he wants Meloetta, but maybe we'll be lucky and Seger will end up leaving forever. :-D
Speaking of Meloetta, she is also in this episode. Not really surprising since she was following the group secretively in the last one.