There is 2 ways to unlock Spamton NEO, so I'm going to cover both of them. 1. Go to Spamton's shop (if it's open, of course (how? beat Spamton's first battle)) and talk to Spamton about 'our deal ...

To get started, 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 style. Your regular shots will clear small Spams ...

You’ll have to fight Spamton NEO as Kris solo, making this the hardest encounter in the game so far. Want to be a bigshot? Go for this supremely creepy twist on the standard game.