While Phione and Mew are the only Legendary Pokémon you can get directly in My Pokémon Ranch, you can transfer other Legendary Pokémon from other games using the WiiConnect24 service.
Here's how it works:
* Connect My Pokémon Ranch to your Nintendo Wi-Fi Connection.
* Download the Pokémon Ranger: Shadows of Almia data from the Wii Shop Channel. This unlocks the ability to receive Legendary Pokémon from the game.
* Transfer Legendary Pokémon like Shaymin, Darkrai, Cresselia, and Manaphy from your Pokémon Ranger: Shadows of Almia game to My Pokémon Ranch.
Important Note: These Legendary Pokémon can only be transferred from the specific game mentioned above. They can't be obtained directly within My Pokémon Ranch.