My Robo Pichu is very curious. His enclosure is on my dresser, so any time it shakes around while Im searching through my cloths, he wakes up to see whats going on. Unlike my Syrian hamster I find that Pichu will wake up randomly and do things in his cage. But it seems that he wakes up around 9 -10pm to do some serious wheel running. Im not sure how long hes up.. since I end up going to sleep. heh