Voltron: Defender of the Universe was one of the first anime series to thrive on American television. It was my first encounter with anime when I was a child. I instantly recalled it when I saw this robot lion key made by Randy Padama. The five pilots who formed the Voltron Force used them to unlock the ancient robot lions that assembled to form the giant robot Voltron.
To the best of my knowledge, Padama's replicas won't do that (though you are welcome to experiment), but they will keep 16 gigabytes of information saved for you and accessible through a USB port.