Thus far, they have been spotted only in Japan.
Croc: Legend of the Gobbos Mascot Costume
This mascot was found to be attending ECTS 1997, and the photo was shared by Argonaut on their website way back in the day. It has a somewhat shiny coat.
Croc 2 Mascot CostumeA second Croc mascot was found on a Japanese flyer advertising Croc Adventure. Sadly, little is known about this costume, though it is believed to have roamed around another gaming convention to help highlight the game.
Unlike the first, it is less shiny and the snout is longer.