W.D Gaster from deltarune built it all from an empty room

W.D. Gaster in Deltarune
Built it all from an empty room

Mike the Cat, yeah that is Gaster
Even the Titan that is Gaster
In the bunker sits that Gaster
Entry 17's own master

Kris is Gaster
Susie Gaster
Noelle Gaster
All are Gaster

The Knight is an amalgamate made by Gaster intricate
Gaster is actually green
Dad of Sans and Paps I mean

He fell into his own machine
Split to atoms quite a scene
He's a legend immune to ruin
So he created Deltarune

Dess is missing, that is Gaster
Dark world also surely Gaster
And the vessel that we loot
Well that is also Gaster's doom
And actually damn Deltarune that is also fucking Gaster

Change six letters
Do it faster
And the result is

Gaster