>>35106717A lot of pokemon were revealed via in game footage trailers with scenes from battle. For gen 5 specifically you have this trend, as it was before gen 6 made the battle scene dynamic. For example look at the top right pic with drilbur, the cofagrigus back sprite is completely correct. That's because an early trailer showed cofagrigus' back sprite but not its front sprite, hence why a fake front sprite looks so close to the real thing.