There is no official version of LittleBigPlanet Karting for the PlayStation Portable (PSP). The game was released exclusively for the PlayStation 3 (PS3) in 2012. 

If you want to experience the true LittleBigPlanet Karting, your options are limited due to its official delisting from the PlayStation Store in 2018: LittleBigPlanet PSP - LittleBigArchive

The short answer is complicated. While many believe a PSP version exists, the reality is more nuanced. This comprehensive article explores the game’s actual availability on Sony’s handheld, the truth behind PSP ISO rumors, and – most importantly – legal ways to experience Sackboy’s racing adventure today.

) and features very similar "Play, Create, Share" kart-racing mechanics on the PSP. LittleBigPlanet Karting (PS3)

ModNation Racers (PSP): If you specifically want a kart racer on PSP, this is the closest experience. It was developed by United Front Games (the same team behind LBP Karting) and features similar deep customization for tracks, characters, and karts. Why the "PSP ISO" Search Exists

Before we dive into the download process, it's essential to note that downloading ROMs (Read-Only Memory) or ISOs of games can be a gray area in terms of copyright and intellectual property laws. Make sure you have a physical copy of the game or are authorized to download and use the ISO.

Conclusion: Don’t Fall for the Fake PSP ISO – Play the Real Game Legally

To summarize: