9 | Adventure Time - Season

: 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.

: Developed by head writer Kent Osborne , showrunner Adam Muto , Jack Pendarvis , and Julia Pott .

: Sandra Lee served as the art director for this arc, which featured guest animation and specialized background designs by former lead designer Ghostshrimp . Narrative & Character Development Adventure Time - Season 9

: The writing continued to blend classic fantasy tropes—inspired by Dungeons & Dragons —with complex emotional themes. Key Creative Staff Showrunner : Adam Muto

Season 9 leaned heavily into established lore and character maturity: : These outlines were expanded into full storyboards

: While design and coloring happened in California, the actual animation was handled in South Korea by Rough Draft Korea or Saerom Animation . The "Elements" Miniseries

: The season tackled Jake’s existential fears and heritage in episodes like "Jake the Starchild," which delved into his shapeshifting powers and alien origins. : Sandra Lee served as the art director

The season followed the established creative pipeline at Cartoon Network Studios :