Returns property is
| "beGregariousMonster"
| "bodyguardChatMonster"
| "cameraMonster"
| "chateauMonster"
| "clubEmNextWeekMonster"
| "clumsinessGroveBoss"
| "crappyCameraMonster"
| "crudeMonster"
| "enamorangMonster"
| "envyfishMonster"
| "glacierOfJerksBoss"
| "holdHandsMonster"
| "iceSculptureMonster"
| "lastCopyableMonster"
| "longConMonster"
| "maelstromOfLoversBoss"
| "makeFriendsMonster"
| "merkinLockkeyMonster"
| "monkeyPointMonster"
| "motifMonster"
| "nosyNoseMonster"
| "olfactedMonster"
| "photocopyMonster"
| "rainDohMonster"
| "romanticTarget"
| "rufusDesiredEntity"
| "rwbMonster"
| "screencappedMonster"
| "shrunkenHeadZombieMonster"
| "spookyPuttyMonster"
| "spookyVHSTapeMonster"
| "stenchCursedMonster"
| "superficiallyInterestedMonster"
| "waxMonster"
| "yearbookCameraTarget"
| "_afterimageMonster"
| "_chainedRelativityMonster"
| "_chainedPurpleCandleMonster"
| "_chainedAfterimageMonster"
| "_cookbookbatQuestMonster"
| "_gallapagosMonster"
| "_jiggleCreamedMonster"
| "_latteMonster"
| "_monsterHabitatsMonster"
| "_nanorhinoBanishedMonster"
| "_newYouQuestMonster"
| "_prankCardMonster"
| "_relativityMonster"
| "_saberForceMonster"
| "_sourceTerminalDigitizeMonster"
| "_trickCoinMonster"
| "_voteMonster"
Whether the supplied property has a Monster value
Determine whether a property has a Monster value