Roaming Kanto

A roaming Pokémon is a wild Legendary Pokémon that, instead of remaining in one place as a special event, runs around the region it appears in, seemingly at random. Roaming Pokémon appeared in every core series game from Generations II to VI except Pokémon Black 2 and White 2 and Pokémon Omega Ruby and Alpha Sapphire. They have also been referred to as wandering Pokémon, migrating Pokémon, and runaways. Their movement has been described in several ways: one or more of these Pokémon were said to "roam", "migrate", "wander", "race around", "move around", "wander around", "blow around", or "fly around".