Thread:KockaAdmiralac/@comment-28367018-20170820214159/@comment-27345308-20170821054257

I just searched for the three sprites you mentioned and they are indeed in the spritesheet (well, I searched only for the Undyne one but I'm pretty sure the others are as well). The "binary" codes you mentioned (I'm not sure if they can be called binary if they end with a 2 and I'm not sure how you converted those back into images) are in  script that looks like this, which exposes a   function that is used inside   script. The object name makes me think they were used for the animation when the three monsters you mentioned (Toriel, Dummy and Undyne) turn into vapor. In Undyne's case, here, in Toriel's case here and for Dummy's case I couldn't find a YouTube video (people seem to only be uploading Mad Dummy battle videos which doesn't help my search).

So yeah, I believe those are just a thing related to how Undertale works, not any kind of secret, so probably not worth mentioning because most of the people reading this wiki won't be searching the game strings.

Cheers!