Spriting is not my strongest suit, but I made these today, A Dolphin-Kyogre and a Hyogre-Centipede.

Before Kyogre was a powerful Killer whale, it used to be a graceful dolphin frolicking in the ocean.
Before Groudon evolved it spent it's life scurrying through the dirt as a bug.

Made the Dolphon-Kyogre from scratch, using Kyogre colour template.
Just ripped apart Groudon sprite and added bits to turn it into a bug.