Trivia

• BMO's voice was originally much deeper. Pendleton Ward revealed this on the animatic for "Rainy Day Daydream" on the Adventure Time: The Complete First Season DVD box set, which is also heard in the animatic.
• BMO can display emoticons on its screen, as seen in "What Was Missing."
• BMO's screen can be used as a touch screen for at least one function, Jake demonstrated this in "James Baxter the Horse."
• When BMO lowers its volume in "Holly Jolly Secrets Part I," it puts its volume on the lowest setting but could still talk.
• Many of BMO's games are knock-offs of the games for the Atari 2600 video game platform.
• According to "What Was Missing," BMO's prized possession is its controller.
• In the special features section of the It Came from the Nightosphere DVD, BMO's age is shown as "VER. 2600," and its species is "110 VOLT/60 HERTZ SYSTEM." BMO is also referred to as "she."
• During Pendleton Ward's interview with Hot Topic, he stated BMO is his favorite character.
• BMO supposedly has "butt circuits" as mentioned in "BMO Lost." 
• As seen in "James Baxter the Horse," BMO can cry, and its tears are apparently triangles.
• It was revealed in "Shh!" that BMO's favorite song is No Wonder I by the band LAKE.
• BMO is completely the same in the Fionna and Cake version.
• BMO is Moe's favorite robot.
• BMO literally has a heart of gold, as seen in "Be More."
• It was revealed that in the episode "In Your Footsteps" BMO plays soccer.
• BMO's BMO chop memory (which originated from "Card Wars") was deleted in "Be More," implying that we may never see it again.