All pet locations:

VIP ISLAND (Oasis)
The giant blob a slightly rare item.
Looting, turtles and/or ninja turtles.
Rock lobster in the rock shop. (Destiny.)
Chickens and chicks. (Onnet.)
Christmas gifts have a few the ones i got were:
Robot, snowman. There are many others also.
Special events i.e Halloween, or in Neuxs, revolution and crypt.