Johnny is one of the antagonists in Sonic Rush Adventure. He is a villainous robot pirate who serves as the right-hand man of Captain Whisker and a feisty and speedy competitor on the sea. He was created by Dr. Eggman and Dr. Eggman Nega for the purpose of finding and obtaining the Jeweled Scepter.
During the course of the game, the player can find Johnny at seven locations across the Sea Chart. When traveling to these locations, the player can challenge Johnny to a waterbike race. If Sonic wins, the player is given a Chaos Emerald.