Joseph His Friend From School, or simply Joseph, is a main character in the SML videos. He is a young Koopa Troopa who is Bowser Junior's best friend. Joseph is shown to be very athletic, being able to do flips into the pool, streaking hoops in basketball, and is also skilled in other sports. Joseph is shown to be arrogant and has a lot of pride. When Junior passes summer school and he failed, he said that Junior cheated and denied that he failed. Due to living in a creepy rundown house with two dead parents, Joseph has some serious problems. Usually Joseph and Junior gang up on Cody and call him gay. Whenever Cody talks about Ken being real, he usually says 'Dude! He's a doll!' Sometimes, Joseph and Cody gang up on Junior. Whenever Junior doesn't have something Joseph and Cody have, he and Cody call him "uncool" and stuff like that, despite being friendly at almost all time.
Joseph usually attempts to act like a teenager or a young adult but fails due to his stupidity. He enjoys making fun of Cody, mostly because he's gay and in love with Ken (a doll). Despite considering Junior his best friend, Joseph is shown to be disloyal to him at times, due to others being cooler or having cooler possessions than Junior. Joseph is shown to be insane, due to him living with his dead mother (who he possibly killed), his suffering undead father, and Screwball in a house without electricity or running water, and only managing to feed himself by stealing from his dead mother's purse.
Joseph's plush is the same one used for Koopa Troopa, which is why Koopa doesn't appear any more.
Joseph may have very well gone insane by the time of Joseph's House!, as his current living conditions are so poor that he might have snapped as a result, considering how indifferent he is about his home's current condition.
Also, it was revealed in Joseph Moves In! that he was in fact the killer of his mother, having most likely killed her over a sandwich, possibly revealing that he lied about his mom's death.
Due to the above fact, there is a conspiracy that Joseph will not be in the series for a year due to him being killed in Cody the Magician!. After Cody left, a screen popped up saying One Year Later, meaning that a Goomba could be replacing him for a year This was later proven wrong after the upload of Bowser Junior goes to the Sun.
Joseph can also be considered the youngest of the three due to the fact that he was born in October (revealed in Cody's Birthday) and Junior was born in September.
In Joseph's House!, his house was revealed, making him the last of the quarter to do so. It was also the first video that was centered around Joseph.
According to Logan himself in a stream with SML Reviewer, Joseph is adopted. However, Joseph is not aware of this, despite admitting it in Truth Or Dare!.
Joseph may possibly be a kleptomaniac because in Joseph's House!, he claims he steals a lot of stuff.
It could be possible that Joseph has murdered his mother as revealed in Joseph Moves In.
It was confirmed in SuperPowers 2 that Joseph killed his mother since he slit her with a knife on her neck.
Joseph was revealed to be bisexual or pansexual in SuperPowers 2, as he wanted to "plow Junior so damn hard." This leaves him as hypocritical, as he critcizes Cody for being gay, when Joseph himself is partly gay.