Thread:AgentMuffin/@comment-90.3.38.189-20150110143917/@comment-25653892-20150110185946

Not entirely what I'm talking about… It is grammatically acceptable to pluralize the names of Mario enemies and the like. In fact, I doubt anyone has had a problem with pluralized proper nouns. The real problem is apostrophe usage. The proper way to pluralize something is just by appending an s to the end, no apostrophe needed. While some sources have started to say that pluralizing shorter words this way is more acceptable (e.g. "Wow, there are so many E's in that word!" "Wait, did the Gregorian calendar change create two 1752's?"), the standardized way is still sans apostrophes (e.g. "Many words contain Es." "In a philosophical sort of way, there are two 1752s!"). So you can definitely say "Goombas" and "Bullet Bills".