Doomsday (Revenant 1)

This is Doomsday Redenant this is 1 form

more info
This seems to ethier be a mega evo or a regular evo  which has a certain kind of thing to evole it counting that theres another one

its pokedex says "Its most powerful moce, DARKENING can drian life out of many kinds of  POKeMON except  for GHOST type. This dex seems more of a move desc then a pokedex entry.

Unlike the other form this is heavier with a weight of 25.7 pounds. It also taller being 6'08''

Its pokedex number is the same as the gen 2 starter Totodile.

If implamented in a game its possible use as a evolution or if implamented in a gen 6 game, a mega evolution