Beep is a robot character in Mal and Chad that was activated during a thunderstorm.
Beep was created by Mal but unfinished. Beep was activated when lightning struck their tree house during a thunderstorm. Unable to find him, Mal was concerned since Beep was still missing one piece, which was a heart.
Once they found him, they were afraid that Beep might have been a killer robot. Just as they find a newly-built tree house, Beep reappears again and grabs both Mal and Chad. They thought they were about to die but soon realized that Beep was just giving them a hug. Mal also believed that Beep went to all of the trouble to re-build the tree house just to show he was a good robot.