ENIAC is a short lived character from Format Wars II in Season 6.
After they retrieve the remote, the new format DVD arrives, but was no match for the guardians alone. He calls upon the Internet for assistance, and soon a battle erupts. The gang takes cover trying to use the remote, however they needed the exact code for the DVD (being a universal remote, it must be manually programmed).
While the gang try to figure this out reinforcements arrive, the first computer ever created ENIAC joins the battle, however it is short lived when he trips and explodes.