Retarded64 (now R64 for short) was a Super Mario 64 Bloopers sub-series of random and "retarded" Mario-centric videos. It ran from August 2013 until July 2017. The videos usually depict simple tasks escalating into strange and flat out ridiculous adventures because in this series, everyone is an even bigger moron than usual. The humor style is notable for being reminiscent of classic cartoons such as Looney Tunes.
The main SM64 cast is usually depicted in these videos. SMG4 and other YouTubers are rarely, if ever seen, and any chosen color codes are either plot-based or random. Since Mario is the star of these videos, their plots often revolve around his stupidity. In addition, the negative qualities of every character are exaggerated to comical degrees.
As announced by SMG4 in a mail video on July 12, 2017, this series was discontinued due to YouTube's video policy, although the already-existing videos are now known as R64. After the discontinuation the series was merged with SM64 Bloopers, which in turn led to the creation of the SMG4 series.