The Virtual Boy is an interesting piece of gaming history. Nintendo thought that Virtual Reality was the wave of the future in the 90s and released the Virtual Boy: a system that only displayed red and black colors. The console was a failure, and only had 13 North American releases before fading into the sunset.
Each console came with Mario Tennis, a fun tennis game that featured Mario and the crew. It was basic, but still a fine pack in title. Did it need "VR" though? Not really. Honestly, only one game took advantage of VR in a meaningful way: Teleroboxer.
Teleroboxer actually felt like a 3D title that you interacted with, by offering a first-person perspective most games lacked. Robotic boxing was fun, and the Virtual Boy was used in a solid way with this title.
All in all, the Virtual Boy remains an interesting piece of gaming history. It may have been Nintendo's worst console ever, but hey: don't know unless you try right?