Reportedly, secrets from the game have leaked online, including information about available Pokémon from generation 5.
Some users are discussing potential Pokémon, such as Zeraora, Heatran, and Darkrai, which may get mega evolutions in post-launch DLC.
Looks like this is the leak of Pokedex so far.
However, some images, such as the one showing Sharpedo but no Carvanah, are considered inaccurate.
Author's note: Beware of spoilers for Pokémon Legends: Z-A.