Syndrome (Earth Alpha)

Buddy Pine, also known as Syndrome, was a supervillain from Earth Alpha. After being rejected as a sidekick by his idol Mr. Incredible, Buddy grew bitter and angry and became obsessed with taking down superheroes to prove that he could be just as super as them. He was transported to Earth Gamma when Buddy Pine used zero-point energy to destroy the device powering Operation Black Mirror, causing a massive explosion that ripped holes through various dimensions. After being discovered by the National Supers Agency agents at the scene of the explosion, Buddy was imprisoned at their headquarters but eventually had to be sent back to his home universe when his existence began to interfere with Incrediboy's. However, he was intercepted en route and teleported to Earth Theta where he was recruited by the Iron Hand. He joined the Irredeemables and used his knowledge of zero-point energy and dimensions to help them with their plan to take over every dimension.

Trivia

 * Buddy is the only person to have travelled between various dimensions multiple times.