One of the holy grails of the fandom is the original 2008 pilot, which had slightly different character designs (Kick wore a blue helmet instead of red). A low-resolution version of this pilot has been uploaded and re-uploaded to Vimeo roughly every two years. Search for Kick Buttowski Pilot (2008) Vimeo . The current active link features a timecode burn and commentary from a former Disney storyboard artist explaining why the show's pacing changed.
serves as a great archive for seeing how the original promos were built using tools like After Effects to start with, or are you looking for similar shows from that era? kick buttowski vimeo