The original Wild Mongrel appeared in Odyssey, in 2001.
The original art was by Anthony S. Waters.
The List
Ultimate Masters
Duel Decks Anthology: Garruk vs. Liliana
Duel Decks: Garruk vs. Liliana
Friday Night Magic 2006
World Championship Decks 2003
World Championship Decks 2002
World Championship Decks 2002
World Championship Decks 2002
Odyssey