Voir Adventures of Sonic the Hedgehog, Season 1, Vol. 1 - Episode 26

When Robotnik invades Labyrinth, an underwater city, and kidnaps Princess Bubbles, a seahorse-dude named Surff seeks Sonic's help. It seems Surff and the Princess are in love, but the royal family deems Surff "unworthy". Sonic, Tails and Surff must avoid the undersea traps and Mobius sea monsters while Sonic rescues the Princess and reunites her with Surff -- making it look like Surff did the whole thing.