SCR-HD

SCR-HD was a robot produced by MeteoTech/MeteorTech. He contained an Ark of the Cosmos until he spontaneously exploded, and it was taken by Storm. SCR-HD was the leader of the more common, mass-produced SCR-GP, and used hiw own Ark of the Cosmos, as well as the one in Eggman's master computer, to command all the MeteoTech/MeteorTech robots.

SCR-HD was first encountered by Sonic, Tails, and Knuckles while they were making their way to Megalo Station. He, as well as several SCR-GP, pursued Sonic and co. until they fell from a window. While falling, Sonic unintentionally activated his Ark of the Cosmos and was saved from the fall. SCR-HD, as well as 6 SCR-GP raced Sonic through Megalo Station, and were defeated.

His next appearence was when he attacked Storm and Amy in Aquatic Capitol/Tempest Waterway. However, before he could fight them, he mysteriously exploded, and his Ark of the Cosmos was taken by Storm.

He appeared again in the Security Hall where he broke in after the race and stole all 5 Arks of the Cosmos from Wave. He then flew away to the Babylon Garden, which was transformed into Astral Babylon by the 5 Arks. SCR-HD then transforms into Master Core: ABIS, and battles everyone on the Mobius Strip. He is defeated, and falls into a black hole, where he was presumably destroyed.

He is unlockable in Sonic Riders: Zero Gravity by beating him in Free Race Mode.