Season 9 started with the introduction of Stingy Spoilero, one of the puppet characters from Lazy Town, now an active participant in the lore. Stingy stole the channel from Joke-Explainer, and would go on to run the channel for the first few months of the year, the channel had several gimmicks. The use of new and never before seen Lazy Town songs, along with a fake soundtrack for the cancelled Lazy Town DS game to upload original arrangments of widely loved LazyTown tracks.
After a few months of peace, Stingy would take over the channel for the month of June, one of the things he had claimed in "The Mine Song", screwing JE out of her birthday celebration. After realzing how he had caused JE great sadness, Stingy relented, and became a slightly better person and semi-frequent guest alongside Dr. Andonuts.
After King for Another Day's promises of Turnabout Despair and a prize for MissingNo. fell through, the SIiva team would give both L&D and MissingNo. an event this year. Law and Disorder got Law and Disorder: Lethal Proceedings, a three day long takeover spent in the AI timeline after the death of the SiIva AI. It follows Phoenix creating rips and Monokuma uploading them, along with deeper insight into the state of the AI timeline since the apocalpyse in DoomFes. The L&D takeover would last 2 weeks, and be followed by MissingNo.'s Sea of Secrets event, (at the time I didn't follow this too closely, I need to watch the lore videos that it came with.)
One of the main gimmicks of Sea of Secrets, in addiiton to rips of buggy/glitchy games and, the sea, was the fact that the metadata would frequently "glitch", referencing older events like the Deletion of Super Mario 3D All Stars and Gabe Newell events, both of which had missing textures or similar obfuscation covering parts of the titles and thumbnails.
SiivaGunner Season 9's most notable events were those that attempted to tie up the loose ends left by King for Another Day, and while these weren't the original prizes intended for MissingNo. or L&D, they were great replacements. The focus on diving deeper into LazyTown after nearly a decade of using only a handful of sources from the show was also quite appreciated. Overall, Season 9 was very interesting, and making an entire fake game to rip songs from LazyTown was incredibly based.
Season 9 would conclude with the uploading of ROTTEN, an FNF mod where Robbie sends a message to the long in the void Wood Man, only for the message to be corrupted and send Wood Man deeper into his state of mind.