Season 9 is the ninth season of SMG4. It began on SMG4's channel on January 19th, 2019 and ended on December 28, 2019. This is the final season in the series in the 2010s decade. The next season, Season 10, would air in the year 2020 as the first season in the 2020s decade.
In this season, the axolotl manga artist Axol makes his debut, as one of the central characters of the first arc of the season, The Anime Arc. It also marks the debut of Greg The Alien, an alien who Mario befriended and rescued from Area 51.
This season currently holds the longest and the darkest arc of the entire series, which is The Anime Arc, which spanned from March to June, and even features the first killing offs of major characters, in where Desti and Francis were written off.
Like Peach in Season 8, as far as major Mario characters go, this is the season where Waluigi appears the least, only appearing nine times with five speaking roles.
While their appearances have been rare, Bowser, Wario, Peach, and Toad have fared a little better, appearing in thirteen, thirteen as well, fourteen, and fifteen videos respectively and having more speaking roles. Bowser has more speaking roles than non-speaking cameos and also has more major roles at the end of this season.