Robo ROM-en

Robo ROM-en is an upcoming stage in, which will be available with the Chill Season 2023 update.

Etymology
From robo (robot) and ROM (read-only memory). ROM-en sounds like ramen, a Japanese noodle dish served in a broth with various toppings; a bowl of ramen is also present on the stage.

Some localizations have used RAM (random-access memory) instead of ROM for the same effect.