This is the cut version of Ebirah that was supposed to appear as a boss fight in the first level of story mode. He has four claw snap attacks, a charge, and a lunge attack. He was only supposed to appear in water, so he is animated as if he is swimming. I've incorrectly referred to this version of Ebirah as "playable Ebirah" in the past before I was aware of his role in the story mode. He was never intended to be playable but is simply in the same file format as the playable characters. You can find relevant voice overs and concept art for the level Ebirah was set to appear in here: • Adventure Mode Voice Lines (Part 2) - Godz...
On the technical side, this Ebirah bundle can be found in both the Xbox and PS2 versions of the game. It was compiled on May 9th, 2004 and does not normally load due to being outdated. I had to update his character data file to match the format used by the final version of the game in order to get him to load. His model is smaller than the version that appears in the undersea battle challenge but is otherwise identical. Because of the difference in size, the animations are not compatible between the two models