Season 8 began on SMG4's Channel on January 6, 2018 and ended on December 29th, 2018. The total number of episodes is 75, with 52 being Blooper Episodes.
SMG4's videos of 2018 have been expanded upon. This was the first year SMG4 did since 2013 that didn't have a Retarded Recap as the New Year Special. SMG4 also has gotten better at balancing his use of SM64 models and Garry's Mod models. SMG4's YouTube friends continue to appear in cameos every now and then, as well as new characters such as Saiko, Tari and Jeeves during this year.
This year marked the point where the channel achieved the 2 million subscriber mark and he celebrated by having the fans submit their own videos for a Ssenmodnar video.
Starting from Waluigi's Time, a story arc began to form with the bloopers with Waluigi becoming a major threat in the series. With each new episode starting from Mario SAW onward, Waluigi gradually took over the channel banner until he was the only character left on it. The arc, following months and months of buildup, culminated in War of The Fat Italians 2018, which served as the Grand Finale of the Arc. Overall, the arc was well received by old and new fans alike and even rekindled some fans interest for the channel.
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In this year, Glitchy Boy Production changed to Glitch Productions, as well gaining a new logo. According to an update video, they decided to change it due to the fact no one knew what Glitchy Boy was since the company didn’t do a good job explaining it.
Because of that, the website that directed to Glitchy Boy has been removed from the description, thus becoming inactive.
There's a new live-action comedy series, inspired from a "Hobo Bros 100k subscribers" video, named Hitbox which has been revealed by Kevin, with the first episode released in Sep 21st, 2018.
Due to Meggy's prominence, this is the season where Princess Peach appears the least, appearing in only twelve videos.