Mary appeared in these episodes:
2A - Bestest Friend, 3A - Parent Teacher Night, 3B - Walk of Doom, 5B - The Wettening, 6A - Career Day, 7B - Rise of the Zitboy, 14 - Halloween Spectacular of Spooky Doom, 16B - Walk for your Lives, 24B - The Voting of the Doomed and 26 - The Frycook what Came from all that Space.

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© 2006 Michael Legg unless specifically noted.
All Zim images are owned by Nickelodeon.