The Happy Squirrel has become a bit of an in-joke in the tarot community since it first appeared in the Simpsons episode Lisa's Wedding in the mid 1990's.
I have counted eight decks that have included a 'Happy
Squirrel card.
Touchstone
Tierney's Delight
Midnight Masquerade
Picture Postcard
Mibramig
International Icon
Animism
and our own TCF Collaborative Deck 2009
Les Adorables
Genius and Very Bright Too Also
Marcelino
All Hallows
Victorian Trade Card
Art Postcard
Twilight Rabbit
Triomphes de Paris
Our own 2012 deck
Elora