When Patrick McHale was preparing a short animation for Cartoon Network, he had a robot character named Raye for that purpose, which Pendleton Ward and McHale loved.However, after Adventure Time got picked up, Raye was redesigned and became BMO.īMO's voice was originally to be similar to a computer-synthesized voice, but as a result of a suggestion from Ward, Niki Yang's natural voice (also voiced Lady Rainicorn) with some adjustments became the voice of BMO.
