SMG4: Mario's Big Chungus Hunt is the second episode of Season 9 and the four hundred and seventy-third overall to be uploaded by SMG4.
The Big Chungus species make their debut in this episode. It was aired on January 26, 2019.
The episode begins with Mario outside in a forest, apparently because SMG4 saw him just dancing naked on spaghetti in Peach's Castle and hence got him to go outside. Once he set up his picnic, he resumed his naked dancing on spaghetti.
However, as he did so, an unknown creature sensed the spaghetti and was approaching him. When it got near it, Mario heard it and turned to its direction. It revealed itself to Mario that it was Big Chungus and when Mario checked to see what it wanted, it indicated it wanted spaghetti. Not letting it happen, Mario told it to go away, just for Big Chungus to come, knock him away, and eat all the spaghetti. Feeling angry over what it did, Mario proceeded to chase after Big Chungus with a gun.
Mario tried shooting at it but missed. Despite it tripping, thus making it easier to shoot it down, Mario still missed. Having enough of it evading his bullets, Mario proceeded to fire off Bullet Bills at it but due to its thick fat, the bullets were easily absorbed by Big Chungus, who went on its way, much to Mario's confusion.
As it went on, Big Chungus came across Mario (who was disguised) selling free candy and took the bait. However, it also eaten Mario alive into a skeleton and the van was taken, meaning the bomb that would have blown up Big Chungus failed as well. Feeling very angry again, Mario unleashed a cage of Chain Chomps at it. Instead of attacking, however, one of the Chain Chomps started to talk about how the Big Chungus had a THICC butt, getting the fat excuse for a bunny offended, and resulting in the Chain Chomps running away screaming, not wanting to get their asses whipped and another victory for the Big Chungus.
Fed up, Mario tried a new strategy and just waited until the Chungus went to sleep, using prank gun making it knocked out, grabbed it and started roasting it alive, but before the roasting part happened, a tribe of Big Chungus appeared with one wearing a policeman cap threatening to call the military if Mario did not let the Chungus go. Mario simply flipped it off and told it to suck his PINGAS, prompting the police to call the military in the form of a giant tank which shot Mario down when he attempted to escape. Waking up, Mario discovered a Chungus offering him some drugs. Panicking, he ran, with two Chungus following him. Suddenly, another Chungus ambushed him. Luckily, Mario threw his cap and mustache at the Chungus, tricking the other two into blowing it up with a bazooka. Once they realized their mistake, Mario, disguised as one of them, asked them if they should give up, but they did not fall for the disguise and roasted Mario alive before he passed out.
Mario then woke up in a court, where Judge Chungus found him guilty of harming the Chungus species. Although Mario tried to explain what they did to him (as well as acknowledging his spaghetti addiction), the judge still did not listen and sentenced Mario to be executed by the largest of all the Chungus, Grand Chungus. Not wanting that to happen, Mario asked for his lawyer, which came in the form of Meggy Spletzer. After a heated argument, Meggy decided the only way that Mario could make up for them was introducing them into the Video-Game industry after seeing the fat plumber playing on the Nintendo 3DS, to much Mario plainly replied: "Pen*ss."
Outside of Nintendo's headquarters, Judge Chungus asked Mario what to do, with the latter responding that he must destroy his competition literally. He started by throwing Shigeru Miyamoto to the sky (and shooting Master Hand dead while he was reprimanding the plumber for his actions), destroying the Microsoft HQ with some well-aimed bullets, and bi*ch-slapping all of Sony's employees plus their security guards. This caused Mario to level up Mafia Style, from level 1 as a Crook to level 100 as a King.
With their competition gone, the Chungus species started to make their own game exclusively for the PlayStation 4, which sold pretty well up to 90,000 copies. The Judge Chungus thanked Mario for the help but unfortunately had to fire him despite his efforts, saying it was better than being killed. This caused Mario's level to be reverted back to 1 and he got thrown out. The episode ends with Mario flipping Meggy off after she asked for a "thank you".