He is an Caucasian male with brown hair.
Appears to be good-natured, and concerned about what was going on at the Scooby Snack factory and even offering Mrs. Constance McSnack a job his factory. But his true nature being jealous, greedy, and selfish was uncovered when he was unmasked as the Cheese Monster and was found out about putting the Scooby Snack factory out of business and having his business taking over the market and with the stolen formula on his own dog biscuits making them a hugh success. After being unmasked and arrested, he was mad at Scooby because he ate his costume.
A Pup Named Scooby-Doo
After the Cheese Monster scared off all the employees at the Scooby Snack Factory and forcing Constance McSnack to close it down, he made a news report that his company would supply the dog treats until her factory could re-open again. He then supported her after a failed investigation into the monster attacks, and even offered her a job, but he was disappointed though when she told him all the top secret formulas was locked away in her factory so they couldn't add her ingredients to his own. After the kids probed Mrs. McSnack for questions, she and Mr. Acme left in a car together.
During the kids' search through the abandoned Scooby Snack factory they heard the ruckus Mr. Acme made and managed to see the back of him, fleeing around a corner. When the Cheese Monster cornered Scooby-Doo into a locked room he did the only thing he could think of: eat it neck down, leaving only the head intact, but also revealing the body of Mr. Acme and that the monster was only a costume. He tried to escape, but Velma Dinkley quickly entangled him with her yo-yo. Once the police arrived they took off what was left of the Cheese Monster to reveal that it was in fact Larry P. Acme. A clue was when his blue suit (which he wasn't wearing underneath his costume) was found in the trash. He wanted to put his main rival company, the Scooby Snack Factory, out of business by dressing up as the Cheese Monster to scare off its employees so he was free to find the secret formula so he could improve his own distasteful recipe and take over the market. And he would have gotten away with it too if it weren't for those pesky kids and that puppy who ate his costume! But it was delicious!
(angry after being unmasked) "I would have done it too, if it hadn't been for you pesky kids, and that puppy! He ate my costume!"
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