>>527646471
Oh and , not that it's Gaster related at all , but definitely Sea related and possibly dragon related:

there is a house in the Jackenstein maps that has giant serpents covering the whole background

Here I looked at the rest of the Jackenstein houses after the crazy "neo chess theory" map with the chapter routes on it.

The most interesting one is the house with a huge snake covering all the hallways (wonder if this is connected to Susie's house which has some snake-like stuff behind the FRIEND Cutscene). And a few with pipes (ICE-E?)