Richard in The Legend of Zelda: Link's Awakening is likely based on the main character for the game Kaeru no Tame ni Kane wa Naru (or "The Frog for Whom the Bell Tolls"). This is evident in his villa, in which the music that is played is a remixed version of the main theme from that game, and the frogs found hopping around his villa being a reference to the gameplay of his own game. Link's Awakening also uses the same engine as For the Frog the Bell Tolls.