SegFault

the SegFault is a creature that turns people in to Overlords.

he first of all attacks his chosen person with his spiritical line to connect himself with the chosen person's body (his first chosen was Steavy Gloria).

then he comes in to the body of the chosen person and together the two bodies make a giant evil body called an Overlord.

the SegFault only controls who ever has found his diamond (he does that for revenge and the chosen gets killed before the two bodies collide because of the line).

the SegFault is the true villain in Agent Sploder goes on a mission season 2.

history
the SegFault attacked Steavie Gloria (Eddie Thunderman's best evil friend), killed him and created out of the two bodies a giant rock monster named an Overlord.

episode 14: Thief Samurai's return.
the Overlord villain died but the SegFault didn't

Eddie Thunderman took the Overlord diamond ready for to be attacked by the SegFault

episode 15: the new Overlord
Eddie finally got attacked by the SegFault, died and turned to be the new Overlord.

episode 16: Mission Accomplished
the new Overlord died and the Segfault's results where unknown.

but some-how, the DegFault returned in "Agent Tal goes on a mission"

trivia

 * the SegFault was a bat that turned in to the first and only SegFault by the magical power of the diamond.
 * he might be the only SegFault, but in episoide 3, Wizardon and Crookadon Chambells built robotic SegFault.
 * the SegFault is the strongest villain. he has powers to kill or make a villain.