A little late, still this are my entries:

#1 Fire Wolf

• Sizzler (from Sizzling, cute and tough)

#2 Grass Raccoon

• Herbyer (from Herbage)

#3 Water Whale

• Glaidenous (from glider and giantous i guess :P)

#4 Electric Rabbit

• Zapper ( i mean... it just do it)