Nanotechnology

https://en.wikipedia.org/wiki/Molecular_machine
Nanotechnology is a science of making miniature robots that do stuff. In fiction, they can do whatever the writer wants, and they can be used as an excuse for almost anything. They are often accompanied by the phrase, "Nanomachines, son! They harden in response to physical trauma!" which is a line from the 2013 videogame Metal Gear Rising: Revengeance.
In the Car Wash, the most obvious uses of Nanotechnology are Chroma Key's Blaster, which using nanotechnology can shrink down to fit in his pocket, and the various ways it was used by Blue Bowser.
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