Yes, and it’s an interesting phenomenon, really. My partner first observed it in the contest halls in Hoenn, but apparently, female pikachu adore performing so much that certain costumes allow them to adopt certain personas and unlock specific dormant abilities. She theorizes that it’s similar to how all pikachu can learn Fly or Surf but can only do so under very specific circumstances.
In any case, it only seems to happen with five specific costumes, typically available in contest halls under the Angelic Beauty label—or, well, knock-offs thereof. No other costume combination seems to trigger latent moves, I’m afraid, although most pikachu will enjoy dressing up all the same.

