Klefew are infamous tricksters that love to collect keys, even ones that were in use at the time of acquisition. They tend to be so elusive that these keys will be lost for years before they might turn up again.
A Klefew is said to possess the genes of all Pokémon. It never lets go of a key that it likes, so people give it the keys to vaults and safes as a way to prevent crime.
