I know it is a licensed theme but I have mentioned this before - Scooby Doo. That mutt is timeless. I loved him as a kid and my kids love him as well. Heaps and heaps of scope to play with ghosty type toys on the machine, collect scooby snacks and clues to solve the various mysteries that they could have as modes. Really concentrate on Daphne's assets like the good old pin artwork used to do e.g. Strikes and Spares backglass. The machine would HAVE to be modelled on the cartoon and not the movies like Flintstones was.
