Meh, Bellossom aren't so great and we saw them dance in the 2nd Pikachu short anyway, so nothing they did here was special...
Pikachu using dance moves that he learned from Bellossom to dodge attacks was great, so I wish he had kept that strategy in future episodes.
Not to mention we get to meet Bellossom in this episode and I'm glad that Bell and Bella managed to get the last dance move right.