The super fun looking Taiko no Tatsujin Nintendo Switch Version! is getting a special downloadable content pack on the 10th October. It is an Undertale mashup and it adds three new songs for you to play your way through. Japanese Nintendo reports that the three songs included within the special DLC package are MEGALOVANIA, Heartache, and Hopes and Dreams. Bandai Namco has yet to announce pricing for the pack.