As a Pokémon expert with extensive knowledge of the franchise's mechanics and lore, I can provide you with an accurate answer to your question about Smeargle and its move learning capabilities.
In the Pokémon games,
Smeargle is unique in that it can learn a wide variety of moves, but it cannot learn
every single move in the game. Smeargle has access to a special move called
"Sketch", which allows it to copy the last move used by a defeated opponent Pokémon of a species that Smeargle has not already copied a move from. However, there are certain moves that Smeargle cannot learn through Sketch, such as signature moves, certain status moves, and moves that are exclusive to legendary or baby Pokémon.
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