Missing Episode: There was actually another TV Special in the works between Escape From Midnight Castle and Escape from Catrina, which would have focused on the Rainbow Haired ponies. Alas, only one trailer for it was ever released, and the special has otherwise never seen the light of day. It is believed Danny was supposed to be in it, as a Swedish cover for the Catrina special vaguely resembles the trailer and has him on it instead of Megan.
Unintentional Period Piece: Escape From Catrina has an anti-drug theme that doesn't appear in post-1990s cartoons much. Otherwise it avoids looking obviously 1980s due to the lack of humans and timeless fashions.