Board Thread:General Discussion/@comment-27541681-20160216013739/@comment-27541681-20160216015232

Watatsuki wrote: You mean Xanthar's hat ? And I am prettty sure that is just a blue and purple party hat. No colors absolutely belong to one thing. Besides, these characters were designed long before Undertale even existed. True, although Weirdmaggedon part 1 was aired in October and Undertale was published in September. So, Xanthar's development might have been last-minute and there'd be plenty of time for one of the animators to see the game.