 Next, a Puzzle Boys spin-off called "Spud's Adventure", known as , was released for the Game Boy on January 25, 1991.Unlike "Kwirk", in the US "Spud's Adventure" was published by Atlus instead of Acclaim Entertainment, due to Acclaim losing their license in publishing Atlus's "Puzzle Boy" series of games.Unlike "Kwirk", Atlus did not change the protagonist into a tomato, but left him as his original character of a potato, translating his name as "Spud."