In Mario and Luigi: Partners in time, their is an item the player can use called the Pocket Chomp. There is a possibility for this Chain Chomp to pop out in a more feminine version.

Nintendo's new update for Paper Mario: The Origami King lets you know its position regarding pettable "dogs." Which includes Chain Chomp.

Chain Chomp wakes up at random, so there’s no reliable way to predict exactly when it’ll grab the intruders. In order to stay safe, players must have already stopped moving before Chain Chomp ...