*RUN! EVERYONE, RU-
(Ballet Shoes attack sound, SOUL cracking noise)
*... Why?
*Why are you killing us all?
*...
*Hah.
*Hah hah.
*Hah hah hah hah.
*You killed Undyne.
*That means you can beat anyone who’s here now.
*Hah hah hah hah hah...
*Well, what about anyone who ISN’T here now?
*For all you have killed, I say...
*SOULS... UNITE!!!
*(The hero appears)
Basically, on the genocide run, Stroyer absorbs the human SOULs in an attempt to kill the protagonist. As a result, he becomes Stroyer the Undestroyable. His attacks are giant spears, scarfarms that smack the bullet box around, cycles through 9 SOUL modes (Red, Orange (you can only move left and right, but you get a deflection shield), yellow, green, light blue (reverse gravity), blue, purple, grey (all attacks damage) and dark red (projectiles track the SOUL and deal fatal damage)).