Jesper the End | Rideable nyan cat in vanilla minecraft @Jespertheend2 | Uploaded 11 years ago | Updated 26 minutes ago
we all know the nyan cat, right? And we all have seen one in minecraft recreated pixel by pixel. But how about an actual mob.

You can find the command over here:
http://pastebin.com/piNbf1iN

World download:
http://www.mediafire.com/download/784bte2sico3l4a/nyan+cat.zip