Question

What is the difference between mythical, legendary and ultra beast?

Comments

Ultra Beast is only in USUM, Mythical are those considered as "myths" (people think that it exists) and Legendary is "Legend".

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Ultra Beasts are in Sun, Moon, Sword, and Shield as well as USUM.

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Oh I thought that the word "ultra" means that it is only in USUM (I actually didn't know that, thanks)

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Why is this flagged?

Answer 1

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); since Generation V, the two groups are presented as distinct groups in all official media.

Source

Mythical Pokémon are a related but separate group of Pokémon, which are usually event-exclusive.

Source

Ultra Beasts are not designated as Legendary in any official media. They are in fact common Pokemon, just common Pokemon from another dimension.

Hope I helped!