The 64 Mario Stadium was a large-scale Nintendo promotional show held in Japan in 1999, most famously at Tokyo Dome. It was designed to showcase Nintendo 64 titles through live demonstrations, competitions, and stage presentations.

For Super Smash Bros. (Nintendo 64), the event featured:

• Public gameplay demos on big screens

• Stage matches and exhibitions, sometimes involving celebrities or invited players

• Hands-on play areas where attendees could try Smash 64

The Mario Stadium shows helped cement Smash Bros. 64 as a social, competitive party game and played a key role in its early popularity in Japan—bridging casual audiences and the emerging competitive scene.