By far one of the best homebrew apps to ever be written for 3DS. Incredible that it runs full speed on Old 3DS systems.
I have waited for Red Viper ever since the 3DS was announced to have stereoscopic 3D. Each year I became more and more disappointed that not even one VB game ever made it to the 3DS. I mean, the 3DS was practically MADE to run Virtual Boy games, a VB collection was a completely wasted opportunity. I feel fully satisfied now that Red Viper exists, especially after previous years of slow and incomplete VB emulators for 3DS.
To me at least, Red Viper is just as pivotal a homebrew app as Nintendont was for Wii and Wii U.