I tried finding more videos of RX-78 stuff, but Youtube could only give me pages and pages of stuff on some stupid toy.

Here's an advert for the machine:

Kale found a few, here they are:

- Perfect Mah-Jongg

- Excite Baseball

- Mobil Suit
(it says Mobile Suit on the box)

And Takeda's page has pictures of TheProwrestling and the 3 Dimension thingy. http://takeda-toshiya.my.coocan.jp/rx78/index.html