Lefty is one of the arms of Binacle. It left with
Locke and became part of the masked persona Master Thief Keyes (
Mysterious Knuckle) in an attempt to show
Ed that they'd become a very good locksmith duo.
Locke targeted multiple locks created by
Ed. He would pick and unlock them but wouldn't actually steal any of the contents inside.
Righty got mad at
Ed when he decided that he wasn't going to look for
Locke.
Righty had attached itself onto
Bonnie after the break-in at the hotel as it was trying to find
Locke and
Lefty. After reuniting in the hotel hallway,
Ed allowed
Righty to stay with
Bonnie for a day while they went looking for
Locke and
Lefty.
Once they found them,
Righty returned to
Ed to bring him to the Pokémon Center which was on fire and
Locke and
Lefty were trapped inside. It helped put out the fire by using Water Gun. It was reunited with
Lefty some point after
Lefty was taken with
Locke to the police station for question.