Well.. if i was to name all of them... id be going on and on and on.. so ill just name a few..
Simba Lou
Sim Butt 2
Stinkerz
Sweetie
Buttsie Boy
Tinks
Num Num Boy
Buttsie Mutt
Buddy Bud Boy
Butsy Boy
Timbaz
Timmy Tim
Tink tink
BaSim
BaSimberz
BaSimmy
BaSimbaly
Hogatha
Timba Lou
Simba Lou Louz
Fatsy Boy
Fat Fat
Fatters Boy
Sweet Sweets
Simba Lou Who
Sim Simz
Boo Boo (dont ask)
Ti Ti (dont ASK)
Tinkaz
like i said, i could go on and on.. I mostly call him Simbaz or Butsy Boy I bet Simba could out number all of u in nick names... theres tons we call him.