Team Galactic has failed to interest me in the least in their anime appearances. Team Magma and Team Aqua were far more interesting, and at least their plot was easy to follow. I mean, even in the games the Team Galactic plot stinks (why doesn't the time/space distortion do anything, like devolve/level down your pokemon or something? At least in the RSE games there's weather effects).
The unown plot wasn't that great, and it got repetitive, but it was great to see Kenny again, and the part where the one group ends up on the ceiling was hilarious. I also liked that Team Rocket didn't blast off, and at least Aipom evolved. Other than that, I didn't care for this episode.