Jackass

20 years before the start of the series, he created a program that could open any lock in the cyberworld that utilized multiple points of entry and left no evidence, making it nearly impossible to trace him. He managed to steal 10 billion Zenny from banks and public organizations that shocked all of Ameroppa, however, his overconfidence due to his success would get the better of him, and he went after Ameroppa’s military data. Colonel intervenes and sees through Jackass’s trick, and despite his attempt to disconnect before the police could find him, the police and Barrel reprehend him and send him to prison, where he currently resides.

(Source: Mega Man Knowledge Base)