Area Bosses - Which is which and how to find them

As you may notice since you commonly hunt Snowman, but he doesn't have a spawn notice when he appears. Not coincidentally, his spawn timer is in the data - 15 minutes. However, like with other free spawning bosses such as Pianus and Mushmom, there's a slight variance with him. Because his timer's so short, though, it means his spawn timer doesn't vary as wildly as others.