Mario Clash (USA, Nintendo Virtual Boy)

The only real Mario experience on the Virtual Boy, and actually, it's a fairly decent one (even though it does get old rather quick). 
It's like a proper sequel to the original Mario Bros. arcade game, but in 3D! And the 3D really does work in this one. 

Also, this is the more sought after US version, with English text. 

Condition: Good/great.