SMG4 and his friends attend a play Mario plays in, but it seems awfully familiar.
The story begins at Peach's Castle, where Mario arrived, having ruined the gang's playtime with Jenga, with a reasonable explanation that he got cast in an upcoming play, set to be shown in the Gielgud Theatre in Aubergine, Mushroom City, with a little story on his audition.
2 hours later, the Gielgud Theatre opened to spectators, watching the play, with the gang attending. As the play starts, in which it all seems too familiar to the gang as the scenes are somewhat similar to scenes from episodes from season eight, season nine and early episodes of season ten. These included:
SMG4: Mario and the Anime Challenge: Belle, Rob, and JubJub Boopkins appears, with Belle asking Mario to do anime. Belle appearing made Tari suspicious (She's Tari's rival in Meta Runner), before a pillow drops on Belle's head, and Rob, JubJub Boopkins and Mario celebrating.
SMG4: If Mario Was In... Splatoon 2 Mario talked to Watermelon Meggy about training for the "Water-fest", before another melon representing Desti appears and Mario shooting a burst of water. The three ended up shooting water crazily. This got Meggy suspicious as Waterfest sounded vaguely familiar to her. (Splatfest)
SMG4: Mario And The T-Pose Virus: Mario shouted to the A-posing zombies about the death of his "brother", before Rob asked if they could settle it with a bite of corn. Mario then proceeded to kick Rob to the A-posing zombies. Belle sighed about who wrote the script as the rest of the crew attacked Rob.
SMG4: Mario and The Diss Track: Rob rapped about corn for the first ten seconds, then Whimpu pushed him over, and with Mario and the melon, started singing "Mine Diamonds" in a similar manner to Saiko's song Darkest Hour. This time, Saiko is the one who's shocked, before looking at an equally confused Bob Bobowski.
SMG4: Final Hours: Watermelon Meggy kicks watermelon Desti's coffin into a pool of water, very loosely reenacting Desti's funeral in Final Hours.
It was only after the play ended that SMG4 finally raged when the play turned out to be a production of Snitch Productions, and ran off to find SMG3, who he knew had written the play.
SMG4 found SMG3, exiting Cromulus, and yells at him. He was overpowered when Anti-Cast surrounded him. Fortunately, he soon was backed up by the rest of the gang, which then quickly escalated into a fight. Then, Mario was able to stop the bickering between the two content creators and led to a truce between two factions (although SMG3 still had a grudge). The two factions finally came to an end, calling for peace with each other, and both went their own ways. Mario, undecided about which gang to follow, decided on an ultimatum that he splits himself, with both his head and body following each gang, ending the episode.
Belle Fontiere, who is Tari's doppelgänger, appears in the reenactment of "Mario And The T-Pose Virus", even including a close-up of her questioning the writer's intentions. However, this is false to the events of the episode, as Tari's debut episode was released three episodes following the aforementioned, and she had not yet existed as a character.
Additionally, Whimpu, who is Saiko Bichitaru's doppelgänger, appears among the actors pretending to be one of the A-pose zombies (T-pose zombies), even though Saiko was infected only in the second outbreak in "SMG4: Mario and the Waluigi Apocalypse".
However, this inclusion could also serve to suggest and confirm that they were infected off-screen.
This is the first time JubJub plays an antagonistic role.
When the narrator for Mario's play promo reads the disclaimer, a long list of various 1000 Ways To Die episodes is quickly running past the screen.
On July 13, the scene at 8:52 parodying Final Hours was altered for unknown reasons, the original version played a low pitched version of "Emotional Titanic Flute" by New Zealand comedian Matt Mulholland, but it was changed to a generic sad song. It is believed to be changed to avoid copyright infringement.
I Can't Believe It's Not Butter!: The title and thumbnail reference this product, but with "SMG4" in place of the word "butter" and SMG4's character on the tub instead.
Rick and Morty: Cromulus even incorporating the "Show me what you got!" meme.
Avatar: The Last Airbender: The whole video is most likely referencing "Avatar: The Last Aribender" Book 3's episode, "The Ember Island Players". Both stories have the main characters watch a play about their adventures throughout the series and the play(s) show inaccurate portrayals of the main characters.