Swampy's Device

Swampy's device is a saucer-shaped invention provided for him by Eggman Nega, intentions not quite known; the device allows the holder to travel to other dimensions, and in one instance proves capable of long-distance communication. During the "Dimension" saga, Swampy brings this device with him during his surprise return and ambush against Frogger & company, keeping it hidden in a bag; however, what with six frogs he ends up fighting, the bag itself is misplaced, and Frogger, Lillie, & Tad find the device. Tank collides with the device soon afterward, and it suddenly activates and sends the six frogs to Sonic's dimension. The device is later stored at Swampy's space station after the crocodile himself begins working with Doctor Eggman.

Five years later, Tank and Treeby are tasked with finding said device as they are enlisted into working for Mr. D; before long, the two of them find the device at the space station, and bring it back to Mr. D, who begins using it to travel through the alternate dimensions so that he may reclaim the sacred elements. After much traveling and battling the alliance, eventually all four elements are found—but as the  Assault in Boulder Alley takes place, Mr. D loses his two henchmen, as they have a change of heart; when everyone else is transported away via Dib's watch, Mr. D, Wario, and Waluigi are left behind, but they use Swampy's device to catch up with the alliance at the Nazca Lines. Waluigi is left in possession of the device, which works to his and Wario's advantage when the two of them are later inadvertently transported away from the Nazca Lines (as a Xevian ship collides with the device in Waluigi's pocket, activating it) just before the secret weapon can disintegrate them.

The device brings Wario and Waluigi to the planet Blorch, where they are later joined by Shadow & the E-Series as they and the Death Egg appear out of nowhere and crash onto the planet surface. After Shadow explains his tale and intentions, Swampy is also found alive within the Death Egg wreckage, and eventually Waluigi reveals that he possesses the crocodile's device, much to everyone's surprise. Before the device can later be used to transport everyone back to Earth, however, it is abruptly destroyed by a fired missile from one of the attacking Shadow androids during the Battle on Blorch —but not before Bill and Frogger successfully establish communication with Wario & Waluigi from Earth, using the device's holographic projection.