The Poltergust 3000 is a vacuum invented by Professor Elvin Gadd to catch ghosts. It first debuted in Luigi's Mansion, where Luigi used it as his main weapon. It is the first model in the Poltergust line of devices.
The Poltergust 3000 is a vacuum used by Luigi to hunt down ghosts in Luigi's Mansion. To suck up ghosts, Luigi first has to find their weakness (which usually involves his flashlight in some way) and exploit it. Once the ghost is open, Luigi needs to bring its health down to 0 before it can be sucked into the Poltergust and defeated. By sucking up certain ghosts (which can be found after collecting specific element medals), the Poltergust gains the ability to harness the elements of fire, ice, and water to fight certain ghosts and solve puzzles.
In the PAL version of Luigi's Mansion, the Poltergust 3000 has wheels, which allow the user to ride it. Luigi can perform this technique in the Boolossus battle, but it is not used elsewhere in the game.
Super Smash Bros. series
The Poltergust 3000 makes a cameo in Super Smash Bros. Melee on the Vacuum Luigi trophy's back, and it has a trophy of its own in Super Smash Bros. Brawl. It is absent in future installments, being replaced with newer models of the Poltergust beginning with Super Smash Bros. for Nintendo 3DS / Wii U.
Mario & Luigi: Superstar Saga / Mario & Luigi: Superstar Saga + Bowser's Minions
In Mario & Luigi: Superstar Saga and its remake, a newer model known as the Super Poltergust 3001 appears. Luigi is shown to still own the original Poltergust, which he used in various cutscenes in Starbeans Cafe, using it on E. Gadd himself twice, the first time after Gadd taste-tests the Hoohoo Blend in order to prevent him from being forced to use the restroom inside the café (due to his neglecting to add restrooms in the place); the second time due to fear as a result of E. Gadd becoming a "ghost" via a specialized gown after test-tasting the Chuckoccino.
Mario Power Tennis series
The Poltergust appears in Mario Power Tennis and Mario Tennis: Power Tour as a Defensive Power Shot known as the Poltergust Return. Like other Defensive Power Shots, its purpose is to hit the ball when it is out if range. Its offensive counterpart is the Squeaky Mallet.
Mario Sports Mix
The Poltergust 3000 appears in Luigi's Special Attacks in Mario Sports Mix. As there are four different sports in said game, its use varies slightly between each sport. However, each sport has him doing the same thing: Luigi sucks in the ball or puck, then he expels air from the Poltergust at his opponents to cause them to trip. After that, he shoots the ball or puck either toward the goal (in basketball and hockey), toward the open ground (in volleyball), or at the opponents (in dodgeball).
Paper Mario: The Thousand-Year Door
Throughout the Mario franchise, various upgrades to the Poltergust 3000 have appeared. These include:
Super Smash Bros. Melee trophy
Super Smash Bros. Brawl trophy
Names in other languages