Ace Fester, as Grizzly made off with a loot of money he robbed from the bank, he ran afoul of Two-Gun Kid and the Rawhide Kid. After his rifle ran out, he ran off with his steel-lined suit protecting him from their bullets.
When Rawhide Kid was suspected of robbing a train, Two-Gun Kid advised him to turn himself over. Ace Fenton himself began stirring up the people of Tombstone to turn against the Rawhide Kid claiming that he trained the Grizzly to rob a train.
On the day of the trial, Grizzly broke into the courtroom and abducted Rawhide Kid to make it look like they are partners in crime. He tried to kill Rawhide Kid, but this failed and his mask was removed. Rawhide Kid wasn't able to get a glimpse of the Grizzly's face when he ran off. Rawhide Kid and Two-Gun Kid found his empty costume and headed to a saloon that the Grizzly had made on mistake. When Ace Fenton revealed himself as the Grizzly, he and Rawhide Kid got into a gunfight. Rawhide Kid defeated Ace Fenton and handed him over to the authorities.