Board Thread:General Discussion/@comment-26006155-20190617222636/@comment-26006155-20190703131658

The Gaster Blasters aren't just something summoned, because the update to Undertale hinted that Papyrus also had a Gaster Blaster.. and The Annoying Dog stole it, his Special Attack.

So the blasters are physical objects. They're just abstracted in the actual coreographed fight sequences, just like all the other attacks in Undertale.

I see your point about The Dark World being related to Entry 17. It's something to explore.