>>45912264Almost all of them had parts of their designs used in other pokemon or became another pokemon entirely. Internally, pokemon designs fluctuate a LOT and something could look completely different in just 1 month while under development. There might also be mons that have finalized designs but get removed for whatever reason and used in other games. Gastrodon is an exmaple of this. It was finalized by gen 3 but was put in gen 4