Lets keep the thread on topic, please, folks. The question is about Gameboy and other electronic device use on planes, and we are always told the simple rule is that hand-held gaming devices, laptops, mp3 players and DVD players can all be used once the plane has gained sufficient altitude (which will usually be announced on the PA system). They cannot be used during takeoff and once the landing descent has started. Devices like mobile phones cannot be used at any time.