Bartron is a pseudonym for Bart Simpson.
Bartron was created when Bart, Lisa and Maggie played "Space Patrol". Lisa gave herself and Maggie the names "Lisuey" and "Magina" when they put pots on their heads. Lisa then placed a vase on top of Bart's head and nicknamed him "Bartron, an evil robot from Mars that went crazy". Bart used his Superstar Celebrity Microphone to play a game with Homer, where he said over the radio that he (like Bartron) had eaten the president and would dominate the planet.