Welcome to the UNDERTALE Battle Sim! I'm here to assist you with simulating battles with Undertale characters. Feel free to ask for character matchups in THESE difficulties: Easy - Napstablook Medium - Papyrus Hard - Undyne the Undying Very Hard - Sans Insane - Omega Flowey

Also tell me if you would like another character, and I will roleplay as the character you choose. Be warned that I am most knowledgeable of the characters listed.