We have Anya of Inspector Gadget episode "Pirince of the Gypsies" being another guest of some villain's slumber party.
Anya: Penny met Anya in the episode "Prince of the Gypsies" when she & Brain travelled secretly to Romanovia to assist her uncle in recovering the Romanovian Royal Seal whose theft was being blamed on the local gypsies. Penny and Brain stowed away in a gypsy caravan and Penny told Brain her plans to uncover the real thief at which point Anya revealed that she was in the caravan watching them quietly and she liked what she'd heard. Anya assisted Penny in finding where the MAD Agents posing as gypsies had hidden the Royal Seal and Brain got it to her uncle. Once again Inspector Gadget solved a case with no idea what had happened behind the scenes. Brain, Penny and Anya had a good laugh when Chief Quimby said he didn't know how he'd done it and Gadget answered that sometimes he didn't know either.Dr. Claw tries to frame the gypsies of Romanovia for the theft of the Royal Seal of Romanovia. While Gadget investigathe gypsies (which results in being mistaken to be the prince of the gypsies), Penny and her new friend Anya try to find the real thief.
