Professor Moshimo is the creator of Robotboy, Robotgirl and Robotbird (also Protoboy and Robotman). He received a letter from Tommy Turnbull about him looking forward to his latest invention. As a result, Professor Moshimo sent him Robotboy to take care of. The Professor has a Japanese fiancee named Miumiu who also acts as his assistant. Despite the vast age difference between the two Miumiu appears to care deeply for the professor and has attempted to interrupt the professor's work with acts of affection. He also created Protoboy, Robotman and Robotgirl. His former rivals are Dr. Kamikazi and Bjorn Bjornson. He is voiced by Togo Igawa