The confusion typically stems from two other related titles that did have handheld or karting connections: LittleBigPlanet PSP (2009)
If you are looking for a Sackboy experience or a kart racer on your PSP, here are the official alternatives you can explore: Official PSP Alternatives LittleBigPlanet (PSP) : Often called " LittleBigPlanet Portable Little Big Planet Karting Psp Iso Download
LittleBigPlanet Karting was never officially released for the PlayStation Portable (PSP). It was developed by United Front Games and published by Sony Computer Entertainment in 2012 exclusively for the PlayStation 3 (and later via cloud streaming on PS Now). There is no legitimate “PSP ISO” of this game. The confusion typically stems from two other related