Guys, I looked carefully and the Zigzagoon Sprite isn't like in the Gen III-IV-V games. Its clearly a Zigzagoon, but it the Sprite is new. So we can't make comparisions with the sprites we have, and that hidden Pokémon could be anything old and it will not coincide anyway because the old sprite is different than the new. So could be Pidgey, could be a new Pokémon; but compare with the old sprites IS NOT gonna help us.