Antinomia: FF6

I'm not sure to what bug PowerPanda is referring, but Edgar's and Locke's contributions to the dress-up can only occur if they're in the active party, which deviates from the rest of the cast who simply need be recruited to contribute to the scene. That's the "Tuxedo -> Bandanas -> Dogs at the Beach (Locke beats the snot out of Edgar)" exchange. I would guess it's that way because the item shop is relatively small and there wouldn't be enough room for them to both put outfits on Gau and for Locke to run around and punch Edgar without them being in the active party.

When I was playing with that scene, because I couldn't get Locke and Edgar to behave if they were independently placed, I simply forced them into the party, much like how the party is forced to Locke and Celes after the Phoenix Cave.

I'd say the complicated part of that event is its connection to Gau's father, who is insanely complicated and also has a bunch of unreachable and obscurely reachable events.