>>40727183Look carefully at the pictures. There are two top pieces, two bottom pieces. You stick a bottom with a top, and it makes a different pokemon, but the parts are used in unexpected ways.
It's a poke at a mistake paleontologists have made in real life several times - the closest example of the weird "sticking a body part where/how it doesn't belong" we have going on here is Iguanodon. When it was initially discovered, it had a bone placed on the end of its snout as a horn - it was a long, pointed bone that they only had one of, and couldn't figure out where else it would go in their incomplete skeleton. Later, after discovering more Iguanodon skeletons in better, more complete conditions, they realized there were two of these bones, and were actually oversized thumb-like finger bones.