The Item Printer can be gamed with the system clock! The first time you boot up the game, opening the Item Printer sets the RNG seed based on the system time. For 10 rare balls: May 20, 2016, 2:11:13 AM (select "I want to print" 11 sec in for enough time to fade to black)

A video posted by @Sibuna_Switch on X (formerly Twitter) (April 9, 2024 ・ その他 ・ 0:42). Watch and download it on XCLYP.