SMG4: Stupid Mario 3D All-Stars is the thirty-sixth episode of Season 10 and the five hundred and ninety-first overall to be uploaded by SMG4.
This is also the twentieth episode of the Stupid Mario series. It was aired on September 19, 2020.
The Marios are out to play.
At Peach's Castle, Mario attempted to port Runescape for his Nintendo Switch, thinking that he could do better than Nintendo in porting Mario games. As he does though, the Switch became unstable due to the game being incompatible for gameplay. SMG4 comes in with the new Super Mario 3D All-Stars 101, and Mario wasted no time in putting the game into the Switch, ignoring the unstable condition of the Switch.
The unstable Switch later sends out all the Marios coming out from the game, with a happy expression from Mario. Meanwhile, SMG4 was uncertain about the other Marios' stability. As a result, the Marios hung out with each other, even having Jotaro Kujo Mario to kick out Peach who was angry at Mario again for the trouble he caused and wanted revenge. SMG4 interrupted their fun, causing CD-I Mario to lock him up on the castle roof.
The fun continued until Mario got tired. However, as Mario was trying to sleep, the other Marios demanded spaghetti, a request that was denied as only the Alpha Mario gets the spaghetti. As the result, the Marios ransacked Mushroom City in search of spaghetti.
Hopeless at trying to stop the Marios' rampage, he releases SMG4, who later snatched up a plan. Using Tari as a gateway back to the game, he programmed a portal that sucked all the Marios back into the game, however, it too sucked Mario. The only way to get out was for the first Mario to beat Level 1-1, in which Mario managed to win, coming back to Mushroom City. Now back home, Mario can now play the game. Forgetting the consequences, he accidentally released the other Marios again, to the horror of SMG4.