Mythical Pokémon are a related but separate group of Pokémon to {{Legendary_Pokémon}}. They are a group of Pokémon seen so rarely in the Pokémon world that some question their very existence. These are event-exclusive Pokémon that cannot be obtained during normal gameplay, with the exception of {{Deoxys}}.
In Japanese media, Mythical Pokémon and {{Legendary_Pokémon}} have always been presented as distinct groups. In non-Japanese media prior to Generation V, Mythical Pokémon and Legendary Pokémon were both considered to be {{Legendary_Pokémon}} (and the term Mythical Pokémon was unused); in non-Japanese media from Generation V onward, the two groups are presented as distinct groups.