Was it "Just My Imagination" or are we at Season 11, Episode 8 of Supernatural? Besides Sully and his friends, we talk about some modern imaginary friends and Lucas Rizotto's Magnetron (not to be confused with Megatron).

Research Links

• Someone Turned Their Imaginary Friend Into an AI Microwave and It Wanted to Kill Them - IGN
• Lucas Rizzotto (@_LucasRizzotto) / X
• Man Recreates Childhood Friend With AI, Then It Tries to 'Murder' Him - Newsweek
• The Most Prevalent Feminine Mythical Characters in Romanian Folklore – Romanian Language