A villain with super smarts who simply goes by "jimmy" Jimmy will do anything to get wants including killing. Jimmy is insane and has made many inventions. He uses them to fight good and his machinations are usually fish as he loves fish. Jimmy is very egotistical and believes he's smarter than teddy. Jimmy kills anyone who calls him "jimmy neutron" And carries many weapons for this as he really hates it Jimmy's arch enemy is a super hero named Jeremy  he kills anyone named Jeremy