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|"Lisa's unknown relative" is not an official name.|
|Lisa's unknown relative|
|Family||Lisa (unknown close family relationship)|
John (unknown close family relationship)
Unknown Male Adult Rabbit (Number 2) (unknown family relationship)
Unknown Female Adult Bear (Number 3) (unknown family relationship)
|Cartoon debut||"Arthur Babysits"|
- Arthur Babysits (cameo)
- Muffy's New Best Friend (cameo)
- The Boy with His Head in the Clouds (cameo)
- Arthur Loses His Marbles (cameo)
- Pet Projects
- Arthur and the haunted Tree house
He was seen playing Bingo in the introduction and turned around to stare at Thora Read when she was being loud about her victory.