Thread:KockaAdmiralac/@comment-26011534-20170528232525/@comment-27345308-20170529064149

From looking at decompiled Undertale code, I think it's because XP for normal monsters is stored in one place, and for bosses it's scripted. Mir Rawrws took monster XP from the monster database and put it on the site. In  object, I see a line reading so I guess it's scripted.