Which is the best Mythical Pokémon having base 100 in all stats in Gen 7 OU?

Question

They are Shaymin, Manaphy, Mew, Victini, Celebi and Jirachi. (Gen 7 OU)

Comments

What gen OU? And, if this type of question is allowed, it would be nice if you add what are the "pixie mythical" Pokémon are. Do you mean the small, imp-like Mythical Pokémon (Mew, Celebi, Jirachi, Manaphy, Victini)?

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OP says Pokemon with 100 in all stats.

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Which generation are you referring to? Because this would vary by generation

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@An Asocial Moth it says a Mythical with base 100 in all stats, and also mentions "pixies", which most probably implies to the ones which I've mentioned before.

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Maybe mew?

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@OP which Gen OU? And also is Celebi on your list?

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You'll probably get a better answer if you ask here. https://www.smogon.com/forums/threads/sm-simple-question-simple-answer-thread.3685982/

Answer 1

https://www.smogon.com/forums/threads/sm-ou-viability-rankings.3667522/

If we go by SM OU viability rankings, Victini and Manaphy sit in the highest tier among the options you listed

https://www.smogon.com/dex/sm/pokemon/victini/

This outlines why Victini is good, particularly V-create allowing it to be a good band/scarf user and Z-celebrate allowing it catch unknowing teams off guard with a sweep.

https://www.smogon.com/dex/sm/pokemon/manaphy/

Manaphy had a strong niche in rain teams thanks to its natural bulk and hydration letting it stay healthy in the face of status and Tail glow letting it get large amounts of Special attack.