Board Thread:General Discussion/@comment-26006155-20190820122909/@comment-26006155-20191127121715

Not only is Sans in Smash, but Gaijin pointed out on his stream that Toby has hidden even more Easter Eggs in other games on the Switch.

The Undertale songs in Taiko no Tatsujin (the drum rhythm game) have a secret pacifist most, where if you don't hit any notes for the first half of the only, you unlock a secret binary code that actually translates into lyrics for the song: https://www.youtube.com/watch?v=SyHibm2_W0Q

So it's looking like Toby and Nintendo are good friends overall.