From the Super Mario Wiki
Professor E. Gadd with the original design for Poltergust 3000
“That’s the vacuum cleaner I engineered to catch ghosts.... It’s the only way to foil ’em! This is the only thing they fear!”
—Professor Elvin Gadd, Luigi's Mansion
The Poltergust 3000 is a vacuum invented by Professor Elvin Gadd to catch ghosts. Its first debut is used as the main item in Luigi's Mansion, and makes some appearances later in the Mario series as well.
E. Gadd made a new and improved model of the Poltergust 3000, sometime after the events of Luigi's Mansion.
The Poltergust 3000 is a vacuum used by Luigi to hunt down ghosts in Luigi's Mansion, such as Boos. Luigi can stun a ghost with the flashlight, and then can suck it up. It has the ability, with help from special Elemental Medals, to harness the elements of fire, ice, and water to fight certain ghosts.
It can link up with E. Gadd's Ghost Portrificationizer to upload captured ghosts and turn them into portraits.
Super Smash Bros. series Trophies
| Vacuum Luigi
|| Luigi's Mansion
| In a strange twist of fate, Luigi wins a huge mansion in a contest he didn't even enter, and the place turns out to be haunted! After meeting a weird professor named Elvin Gadd, Luigi enters the place armed with a flashlight and a ghost-sucking vacuum cleaner. Mario's trapped somewhere in there! Can Luigi save him?
| Poltergust 3000
|| GCN Luigi's Mansion
|| A vacuum cleaner developed by Professor Elvin Gadd of the E. Gadd Science Corporation. He gives it to Luigi, who uses it to trap ghosts in a haunted mansion after stunning them with his flashlight. It also absorbs elements like water, ice, or fire that it can then shoot out. An optional accessory to this fine product is a machine that converts the trapped ghosts into portraits.
Names in Other Languages
|From the English vacuum, and obake (ghost).
||Pun of the Spanish words succionar (vacuum) and ente (ghost or spirit)
||Pun on ectoplasme (ectoplasm)
||Pun of the Dutch words spook (ghost) and stofzuiger (vacuum)
||From Schreck (fright) and weg (gone), as well as 08/15, a figure of speech used to describe something ordinary
||Pun of the Portuguese words sugar (suck) and espectro (ghost)
- The Poltergust 3000 is named after the terms "poltergeist", which is a ghost who makes itself known through things such as noises, and "gust", a reference to wind. The "3000" part of the name is probably present because of the "thousand" numbers after mad scientists' inventions in typical science fiction movies.
- In Super Mario Sunshine, a Pianta at the Sirena Beach hotel asked Mario to "get rid of these ghosts with a vacuum or something" when the hotel was infested with Boos. This is a reference to the Poltergust.
- The Poltergust shares some similarities to Mario's F.L.U.D.D., as Mario and Luigi use their respective weapons for the entire game and wear them on their backs. It was also made by the same person, Professor Elvin Gadd.
- In Fortune Street, Luigi, at one point, mentions he should have brought the Poltergust 3000 with him.