Horned kangaroo

Horned kangaroos are an alleged species of marsupial found in New California, likely descended from the kangaroo, an Australian animal. However, their existence is speculative, as bones alleged to belong to this species are too weathered to make a final determination.

Appearances
The remains of what seems to be a horned kangaroo appear in Fallout and Fallout 2.

Behind the scenes
The kangaroo is a likely reference to the Mad Max series.