Sega Master System / Mark III / Game Gear
Sega8bit & SMS Power! 2013 Event - 10th August 11 weeks and 5 days from now
During the "Namcot for Sega Game Gear" Screen, press +. Note: the code from Gear Stadium was reused but now it shows graphics instead of numbers.
See the main page for Gear Stadium Heiseiban (ギアスタジアム 平成版)