Mystery's Request? ●△■! Customer of the Invention Department (ナゾの注文？●△■！発明部のお客様 Nazo no chūmon? ●△￭! Hatsumei-bu no okyakusama) is part one of episode 8 of GO-GO Tamagotchi!. Along with part two, it is episode 229 overall. It first aired on May 22, 2014.
In the robot class, the students must create a robot with a circle, triangle, and square theme for a customer who is coming to DoriTama School. Each student makes a unique robot with this theme, and the customer then arrives to choose which one meets his needs.