Living in the town of Green Hills, Montana, Crazy Carl would discover Sonic the Hedgehog's presence on Earth, whom he would call the "Blue Devil". However, no one in town believed his stories, causing him to be labeled as the town lunatic. Crazy Carl also attempted several times to capture Sonic, only for Sonic to either elude him or make him get caught by his own traps.
Sonic the Hedgehog
Crazy Carl coming to Sonic and Tom's defense, from Sonic the Hedgehog (film).
One evening, Crazy Carl, along with the other residents of Green Hills, arrived to stand up for Tom and Sonic when Dr. Robotnik had them at his mercy with his Eggpod. Crazy Carl in particular had a chainsaw ready and announced that Sonic was proof that he had not made him up, but Wade Whipple cautiously told him to put his chainsaw away. After Sonic and Tom had then banished Robotnik to the Mushroom Planet, Wade told Crazy Carl to relinquish his chainsaw.
Comics
Sonic the Hedgehog 2: The Official Movie Pre-Quill
While out, Crazy Carl caught Sonic talking to himself about giving himself a cool superhero name. While Crazy Carl insisted that "Blue Devil" was still the best name for him, Sonic dismissed it while noting that his suggestion sounded better than "Crazy Carl". However, Crazy Carl retorted that he was not as crazy as he looked.[1]
Personality Considered Green Hills' town looney, Crazy Carl is quite eccentric, which has alienated him from the rest of the town. However, he is not a malicious person by default, having come to the aid of the town sheriff and his rival in despite of having been laughed at by the former. He is also extremely observant. In addition, he has proven himself quite determined when it comes to achiving his goals, namely in regards to his obsession with catching Sonic and proving that he had not made him up in spite of numerous failures. He is as well laid back enough to interact with the townspeople without feeling threatened by them.
Powers and abilities Crazy Carl possesses some skill at setting traps, such as bear traps and snares.
Weapons
Crazy Carl possesses a chainsaw. His proficiency with it is unknown.