Formal:
* Mew's unparalleled versatility allows it to master any technique imaginable.
* Its innate adaptability grants it the ability to learn and execute any move, regardless of its usual type.
* The mythical Pokémon Mew possesses a unique mastery over all moves, making it a truly formidable force.
Informal:
* Mew is a master of all trades, capable of learning any move in the book.
* This mythical Pokémon is a blank slate, capable of becoming a master of any fighting style.
* With its vast potential, Mew can learn any attack, making it the ultimate chameleon of the Pokémon world.
More poetic:
* Mew's spirit dances through the tapestry of all attacks, weaving a masterpiece of combat.
* The very essence of combat resides within Mew, allowing it to embody any fighting style with unmatched grace.
Ultimately, the best way to describe Mew's ability will depend on the context of your writing and the overall tone you want to convey.