Since the beginning of the music game genre, there has been one question that has boggled man's mind:
WHAT THE HELL'S UNDER PARAPPA'S HAT?

The bipedal rapping dog has never taken off his hat at any point of the game, or possibly his life.

The issue of what [=PaRappa=] looks like underneath his beanie is such a video-game-character-related issue, that the upper half this WMG has been dedicated to finding an answer.

!![=PaRappa's=] Hat Theories:
* PRHT 1: [=PaRappa's=] bald.
* PRHT 2: [=PaRappa=] has red hair.
* PRHT 3: [=PaRappa=] ''doesn't have a scalp''. His hat is the only thing encasing his brain.
* PRHT 4: [=PaRappa's=] a robot, and the hat hides his cranial circuitry.
* PRHT 5: [=PaRappa's=] head is shaped exactly like his hat.
* PRHT 6: [[WesternAnimation/EdEddNEddy Ed, Edd, and Eddy's]] universe is contained under his hat. [[RecursiveReality His universe is contained under Double D's]].
* PRHT 7: [=PaRappa's=] hat is the one thing that lets him literally have a grip on his sanity.
* PRHT 8: [=PaRappa's=] hat is part of his head.
* PRHT 9: [=PaRappa=] keeps drugs in his hat [[WhatDoYouMeanItWasntMadeOnDrugs (which would explain a lot.)]]
** PRHT 9.1: He gives those drugs to the makers of the games. Talk about ForTheLulz.
* PRHT 10: [=PaRappa's=] brain is stored in his hat.
* PRHT 11: [=PaRappa=] ''is'' his hat. Everything else is just a meat puppet.
* PRHT 12: [=PaRappa's=] hat is what grants him his [[FunnyAnimal anthropomorphism]]. If he goes too long without it, he [[EvolutionaryLevels degenerates down the]] SlidingScaleOfAnthropomorphism until he becomes [[BroughtDownToNormal your average]] [[PhlebotinumInducedStupidity non-sentient,]] [[FourLegsGoodTwoLegsBetter four-legged dog.]]
* PRHT 13: [=PaRappa=] hides a ThirdEye under his hat.
* PRHT 14: [=PaRappa's=] [[OurSoulsAreDifferent soul]] is stored in his hat.
* PRHT 15: [=PaRappa=] has an EmbarrassingTattoo on his head.
* PRHT 16: [=PaRappa=] has a [[FunnyAfro comically oversized afro]] crammed under his hat. Especially considering Stage 5 of PaRappa the Rapper 2.
--> '''Hairdresser Octopus:''' "Hey, take that [[NiceHat stupid hat]] off. What does it look like in there?"
--> '''[=PaRappa=]:''' "Aaa, I'm not sure myself."
* PRHT 17: The Bermuda Triangle leads to the inside of [=PaRappa's=] hat.
* PRHT 18: [=PaRappa=] has a [[{{Futurama}} Reverse Brain Slug]] under his hat.

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Now for other theories about the [=PaRappa=] [[TheVerse Universe]]

* Sunny Funny's genitalia is inside her head.
** [[RealLife Real world]] flowers are the reproductive part of the plant. Sunny Funny has a ''[[FridgeHorror flower for]] [[{{Squick}} a head]]''. What that says about what she has [[DoubleEntendre downstairs]] is kind of [[VaginaDentata unsettling]].
* Katy Kat smokes when nobody's looking.
** I can't be the only guy to notice that Katy's voice gets [[VocalEvolution shriller and raspier]] with every sequel. There's definitely some damage to her larynx going on.
* ''Parappa The Rapper'' is set in the same [[TheVerse universe]] as ''WesternAnimation/RegularShow''.
** Think about it. Both are set in a MundaneFantastic WorldOfWeirdness populated with {{Funny Animal}}s and AnthropomorphicObjects that [[LionsAndTigersAndHumansOhMy coexist with humans]].
* ''Parappa The Rapper'' is set in the same [[TheVerse universe]] as [[PopNMusic pop'n music]].
** See above.
* ''WesternAnimation/TheAmazingWorldOfGumball'' is set in the same [[TheVerse universe]] as these games.
** Proof of this is the first issue of the comic has a DMV instructor who bears a strong resemblance to Instructor Moosilini, in the second issue the Karate Instructor bears a strong resemblance to Chop Chop Master Onion... now either this is true or the writer is a HUGE fan of Parappa the Rapper!
* The ''WesternAnimation/RobotChicken'' parody (where [=PaRappa=] was defending himself in court and was shot by King Kong Mushi) happened.
** How else could he have been able to play [[PlanetHeck Stage 6 of]] ''[[PlanetHeck Lammy]]''?
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