I just freaking realised.

The wordsearch. I finally realised why it has a picture of Ice-E, a “character” that isn’t referenced anywhere else in Undertale.

It’s not made by the puzzle makers in the librarby.

It’s out of one of those activity packs they give out in restaurants to keep kids happy while they wait for their meal.

It’s from the Ice-E’s Pezza restaurant in Deltarune.

sans gave the human a puzzle from a restaurant that only exists in deltarune