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Revavroom has five different Starmobile forms created by Ortega, which are only seen in battles against the respective Boss of Team Star and are currently unobtainable to players:
This section is incomplete. Please feel free to edit this section to add missing information and complete it. Reason: Missing physical description
Revavroom can create gas by combining its poison with mineral from the rocks in its body. Revavroom uses the gas to generate energy for its cylinders. This aggressive Pokémon uses the exhaust to threaten foes with its sound. Revavroom uses its long tongue to unleash toxic fluids. Revavroom are capable of running machines when attached to them. Ortega created unique Starmobile forms for Revavroom to run as an engine alongside Varoom. These Revavroom are larger than others of their species.
Due to them being part Steel type, Revavroom and its pre-evolution Varoom are also the only Poison type Pokémon to be immune against their own type.
Revavroom and its pre-evolved form were shown in multiple trailers and gameplay showcases but remained unnamed until the release of Pokémon Scarlet and Violet.
Revavroom and its Pokédex entries are similar to a concept brought up by Ken Sugimori in an interview featured in The Official National Pokédex: Pokémon Ultra Sun & Pokémon Ultra Moon Edition. While discussing the Pokémon design process, Sugimori stated
"If we were going to make a Pokémon based on the motif of a car, for example, what would it eat? Would you make it able to suck up gasoline? How would it use that source of power? Even if the design is based on a car, a Pokémon is a living creature, so we would work over and over how to express its "car-ness" and what its source of energy should be."
Origin
Revavroom seems to be based on a multi-cylinder car engine, and the rocks attached to its body make Revavroom resemble an automobile. Its front grill and spikes combine to form a skull, which is a common icon for both biker gangs and toxic substances.
Name origin
Revavroom may be a combination of rev (to increase the running speed of an engine by pressing on the accelerator) and vroom (onomatopoetic sound of engine revving up).
Burororōmu may be a combination of ぶろろろ burororo (onomatopoeia for engine sounds) and roam.