Since They Are Mentioned - Tumblr Posts

I don't know how many people noticed this but there are things that imply that goats are not the only type of Boss Monsters. We know Asgore and Rudy were in college together, which means they are the same age, which means Rudy is a Boss Monster!! Plus, Alphys in undertale says Asgore probably should "stop going after furry Boss Monsters". Why would she specify that Toriel is a furry Boss Monster if there weren't any non-furry ones? Sooo maybe there are a lot more types of them, it's just we don't know for sure now