Bad Seeds (found pilot of "Harvey Beaks" animated series; 2013)
Bad Seeds is the found 2013 pilot for the 2015 Nickelodeon show Harvey Beaks. The pilot is an older version of the episode "Pe-Choo," the first episode of the show. The pilot has some differences when compared to Pe-Choo, such as the Spirit of Wetbark Lake using a different color palette and Technobear being an adult instead of a child.
The pilot briefly surfaced on Vimeo and YouTube, but both videos were taken down by Viacom, leaving on screenshots to prove its existence. Most of these screenshots are available through C.H. Greenblatt's (the show's creator's) Tumblr blog.
However, in 2016, the pilot was uploaded to MEGA by an unknown user and has since been available to download.
Here are a few of the images from C.H. Greenblatt's Tumblr: