|LEGO → TECHNIC → Slizer|
Ultrarex is one of the Slizer Fusion/Super Throwbots and is the combination of Judge/Jet, Jungle/Amazon, Rock/Granite, and Energy/Electro. It has three Disc Launchers; two arm-mounted, one tail-mounted. It once battled with Robotops as seen in the comic below. It is unknown who had won the battle. It is sometimes named as the "Evil Throwbot", as Judge/Jet, Jungle/Amazon, Rock/Granite and Energy/Electro are all on the "evil" side of the Throwbots.