A member of the Unova Elite four who specializes in training Dark Type Pokemon. Grimsley was also a former card dealer in a casino.
Grimsley came from a rich family,who unfortunately throughout his life had lost all its money. as a result, he turned to gambling for recluse, and became addicted during the decline.
Grimsley appears in Chapter 8 of the Pokemon Adventures:Black and White manga, under disguise as a travelling gambler. he was seen on Route 4, entertaining the construction workers during their lunch break with a card flip, assisted by his Bisharp.
Black , while waiting on White to return from buying gear to cross the desert, meets him after the workers leave, and is challenged to a guessing game with a wild Drillbur, where it pops up on a side of a line drawn by Bisharp, and one has to guess which side it lands on. when the score reaches 3-3, a person walking across gets trapped in a hole from the burrowing. however, since Grimsley had used the side of the desert that wasn't under construction and ordered the workers to stay clear of the play area, he deemed the person to be an impostor, and after a breif battle, unmasks them as a Plasma grunt, he then reveals his true Identity to Black, and challenges him to a battle.