OK, here's my list:

Tigger - Tigger Lou, Lou-bee, Tigs, Sweat Pea, Tweety Pie

Smokey - Mocha, Smokey Joe, Chubba, MoJo

Tucker - Tookie Cookie, Cookie, Cookie Monster, Tucks

Mystic - Flubby Wubbie, Flubs, Flubby

Abner - Abbey, Abs, Abalisous, Abbey Bo Dabby, Brat, Abadab

My rainbow bridge babies: Tobias used to be called Butthead and Tony was TeeTow