Apologies cause grammar is not a strong suit for me, but wouldn't Ninjatown fall under proper noun category? It's spaced out on the DS box but not the Trees of Doom menus, and it's just referring to the in universe town named 'Ninjatown'.

@silvernevermind It technically is a pronoun but it's made up of two separate words that are not themselves pronouns, so it's fine. It's a similar situation as "Ninja Princess" or "Ninja Girl." These are the names of the characters but no single word is itself a name. The true catch here is that "Ninjatown" is a conjunction. No space. I haven't had to account for anything like that yet... but if some exceptions are being made for prepositions like "THE Ninja Warriors" or "Ninja: Shadow OF Darkness" for adhering more to the spirit than the style, exceptions could be made for conjunctions as well

Ninja Cop/Ninja Five-O(?)

Five-O is not anything! Fake nonsense! Ninja Cop will begrudgingly be added to the list

Correction: Ninja Cop would have been added to the list if it was called "Ninja Cop." Unfortunately it is called "Ninja Cop Saizou," with Saizou being the name of the ninja cop. Disqualified