Dr Reflex is a character introduced in Baldi's Basics Plus, the expanded version of the indie horror game Baldi's Basics in Education and Learning. He runs a clinic room in the school and forces the player into a reflex test using a hammer, turning a normal checkup into a timed mini game. Clips of his voicelines spread through YouTube edits, TikTok gaming videos and soundboards because the character is less widely known than Baldi himself, making his lines feel like an inside joke for fans.