Buff Riku refers to a popular fanart rendition of a character named Riku from the Kingdom Hearts video game series, drawn with an extremely Brolic body.
Riku was first featured in the first installation of the Kingdom Hearts series, which was published by Square Enix on March 28th, 2002.
The first drawing of “Buff Riku” was uploaded to cyoc.net on July 7th, 2008, by O’Melissokomos.
“Buff Riku” wouldn’t garner any online attention until March 2015, when Games Repainted uploaded a video to YouTube, as they are playing the 2002 Super Mario Sunshine, with “Buff Riku” textures.
By June 2015, “Buff Riku” had appeared on the first Tumblr meme, and soon other illustrations as well as video and image macro memes would follow, especially on sites like DeviantArt, Tumblr, YouTube and Twitter.