Ultron

Ultron (voiced by James Spader) was originally an android designed by Hank Pym and Tony Stark to bring peace and order to the world. He eventually gained sentience, and became one of the Avengers' most formidable foes.

In Twilight and Kyle's Adventures Series, his first appearance is in Twilight and Kyle's Adventures of Avengers: Age of Ultron, he later became the TRUE king of Heylin Empire as well as the TRUE antagonist, and became the Rainbooms and Team Owl's most hated and feared enemy in Season 5, and Halloween specials.