Another species I'm making, alot less expressive than the last heh; but far more dangerous!~
Their names are of course combining Imp & Inflatable; Although they look slightly more like a kobold or other reptilian. They certainly have the mischievousness of little devils! Imphlatables look rather identical and mass-produced, so there's no mistaking them. They can talk and breath through that hole on the front of their face, looking like a gag normally, if you push it in it would resemble a blow-up doll's... ehem... mouthpiece. Not that you should be getting anywhere near these troublemakers!

They have two weapons, the first is their pool noodle 'tridents', like real pool noodles they have a hole running through them that they blow liquid out of; the fluid is unidentified as of yet. Getting smacked by them doesn't hurt except for the pointy bits on the end, but that shouldn't be dangerous unless you were filled with air like them! And you aren't; why would that even be the case?
... Welp, the second tool they employ are inflatable mouthpieces. They seem to have an endless supply they pull from a mallet space; if they attach one to you, that's the beginning of the transformation. Next they'll blow into it to rapidly exacerbate the changes, you'll feel airheaded as you become see-through and your exterior a smooth, shiny PVC. You'll either become a pooltoy version of yourself, still able to move but most other functions gone, or a completely immobile doll; On rare occasions you'll instead become one of them. That's where the name truly comes from! These critters are found all over the multiverse and should never be taken lightly!

Remember, they can place the mouthpiece anywhere on you for it to work; but they do have favorite spots to aim for.