If you’re a big fan of Deltarune, you absolutely don ... use the fast travel door to go back to the Trash Zone. In this fight, Spamton NEO launches waves of himself at you in shoot-em-up ...

There is also an optional fight with a Werewerewire. Pipis. The Genocide route culminates with a tough boss battle against Spamton NEO, so make sure you stock up on CD Bagels before the fight.