Found another bug with Mew in Pokémon Yellow, if you learn a new move while transformed, your moveset will switch to your Mew's. : r/nuzlocke

PKMN OPEN] - Pokémon Spear [M] [IC], Page 9

How Mew knows every move : r/pokemon

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Mew/RBY, Project NuzlockeDex Wiki

Types – Pinkie's Paradise

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Mew can't learn everything? - Questions - The Pokemon Insurgence

game, Mindy Games