The Iblis Trigger is the manifestation of Kevin Kyle's pure Autisum-o energy. It first appeared in Scary Godmother: Sonic 06 after Roronoa Zolo consumed Kevin whole. This caused Zolo to become a temporary Iblis Trigger. Zolo was the first one to utilize the Iblis Trigger powers.
When you unlock the secret ending, Zolo "Passes" Kevin. Kevin reformed himself, maintaining his Iblis Trigger powers while Zolo loses his.