Finback's shell features a reptile like appearance, complete with a stubby tail at the back half of the shell. The right arm features a bladed arm instead of a normal arm. There is a peg-hole on the right arm that allows one to place the smaller gun of the 2 into it.
Accessory wise, there are 2 guns, one big spear gun and a smaller gun and a belt. The smaller gun is able to be held by both shell and inner robot. The larger spear gun is only able to be held by the shell. The belt holds the 2 halves of the shell together.
Alternate mode wise, Finback transforms into a submarine.
Finback Alternate Mode
Up next, we have Iguanus. As the name implies, Iguanus resembles more of a reptillian lizard than Finback, there is even a tail at the back half of the shell.
As for the accessories, there is a belt, a gun and a 2 wheeled piece. The 2 wheeled piece is crucial to the entire look of the alternate mode and can be held by the shell or attached to the inner robot in robot mode as can be seen in the pictures below. The belt has the same purpose as Bombburst and Submarauder, it does not hold the shell together, it is only for visual purposes.
The alternate mode is that of a motorcycle. To be honest, it does not look at all like a motorcycle. It looks more like an afterthought actually. The only resemblence it has of a motorcycle is the 2 wheeled piece that acts as the motorcycle's wheels.
Iguanus Alternate Mode