KO! Trophy in ASTRO BOT

You need Ryu (Disciplined Warrior), the reward for Retro Rampage 1, a side level of Gorilla Nebula, and Ken (Assured Rival), the reward for Retro Rampage 2, a side level of Tentacle System. Both stand at the back right of the Crash Site, behind the PS5 ship. Slap one of them (), then step between them so their attacks hit you.