Crocs crossover skin for sigma. He then gets special voicelines where he talks about how he used to hate shoes but crocs are really comfortable. A win for blizzard and crocs. :
RoboCroc by Croc -- Fur Affinity [dot] net
Official Transformers: Robots In Disguise Crocs - Transformers News - TFW2005
Lot of 8 Crocs Charms Jibbitz Burger Fries Pineapple Robot G Smile Face | eBay