Freddi Fish and the Case of the Missing Kelp Seeds

In this game, Grandma Grouper's treasure chest of kelp seeds is stolen, and Freddi and Luther go off in search of the thieves, who turn out to be two sharks. (One is called Spongehead, but the other is never called anything but Boss.) Thankfully, Spongehead has a bad memory, so he left a trail of notes in bottles leading to the chest. This game, as well as its subsequent titles, won several awards upon release.