- "Happy: Boss told me when the guy was done, I should take him out. One less share right?" Grumpy: "Funny, he told me something similar." "Wait, what? No...NO""
- ―Grumpy speaking to Happy moments before shooting him.
Along with Chuckles and Bozo (actually Joker in disguise), Grumpy was one of the three henchmen who took over the bank lobby, while Dopey and Happy disabled the alarm system and cracked open the safe. When he was reminded about how they may have to split it into six shares instead of five, because they had to count the one who planned the heist, Grumpy implied that they might just run off with their shares of the money and not pay the Joker his cut due to him "sitting out". Upon entering the bank Grumpy ran towards the tellers, pulling one of them across the table so he could tell him he was making a withdrawal at this bank and would appreciate if he hurried up with getting down on the floor. When Chuckles was killed by a surprise gunshot from the Manager of Gotham National Bank, both Bozo and Grumpy dove for cover. Bozo then tricked Grumpy into taking the Manager's last round, though the wound was not fatal and Grumpy angrily asked Bozo: "Where did you learn to count?!".
With the lobby pacified, Grumpy then made his way to the safe, shot Happy after he opened it (although not before he learned that Happy had killed Dopey under orders from the Joker and noted that his own orders were similar), and loaded the safe's cash into bags.
After he realized that both Happy and Dopey had been killed on the Joker's orders, and remembering the trick Bozo pulled earlier, Grumpy believed that he was next and aimed his gun at Bozo, who walked in a circle as Grumpy kept aim at him and maneuvered him into standing in just the right place; as Grumpy exclaimed that he bet the Joker had told Bozo to kill him as well as soon as the cash was loaded, but Bozo corrected him and said: "No, no, I kill the bus driver". Grumpy, confused, demanded to know what bus driver he was talking about. Grumpy was then hit and killed by the getaway bus that was driven into the Bank's Lobby by the bus driver in question, who was killed by Bozo as well.
Behind the Scenes
- Grumpy took his name from a character in Disney's Snow White and the Seven Dwarfs.
- During the Bank Heist, Grumpy used a Glock 17 (Joker used a full-auto Glock 17 with an extended magazine).