The Poltergust 4000 is one of Luigi's karts in Mario Kart DS, the others being the Standard LG and Streamliner. This kart is the upgraded version of the Poltergust 3000 in Luigi's Mansion built by Professor E. Gadd. Upgraded versions can be found in Luigi's Mansion: Dark Moon and Luigi's Mansion 3.
Luigi's Poltergust 4000 is one of four ideal snaking karts; the others are the Egg 1, Dry Bomber, and ROB-BLS. This kart has high speed, acceleration, and handling, but low drift, weight, and items. These stats make the Poltergust ideal for snaking in the early-game, where the only other viable option is the Egg 1. Although its off-road is not as strong as the light karts, making it harder to maintain Prolonged Rocket Boost and giving less room for error, it is still fairly popular for having an excellent compromise between speed and handling compared to other karts.