: Episodes began as brief 2-3 page documents containing essential plot points.
: Pendleton Ward (remained as a writer and artist after stepping down as showrunner in earlier seasons) Supervising Directors : Cole Sanchez and Elizabeth Ito Adventure Time - Season 9
: These outlines were expanded into full storyboards by artists like Sam Alden , Polly Guo , and Steve Wolfhard . The storyboarders were responsible for writing the dialogue and physical action, making them the primary "writers" of the series. : Episodes began as brief 2-3 page documents
Season 9 leaned heavily into established lore and character maturity: showrunner Adam Muto
: Developed by head writer Kent Osborne , showrunner Adam Muto , Jack Pendarvis , and Julia Pott .