Deep Mang0

Mang0, otherwise referred to as Mango, is the fictional variant of competitive gamer Joseph "Mang0" Marquez. He's shown to be competitive and self-loathing, as well as having a strained relationship with Deep Leffen.

Personality
Deep Mang0 is a very aggressive and competitive person, to the point of “wishing he was dead” after losing in Diddy Kong Racing. Mang0 appears to have developed a self-loathing of who he is, talking about how he misses 'The old Mang0'. Additionally, he has doubts about his ability to continue competing, with him hoping that Deep Leffen would end his career in New Hampshire. He claims that he has achieved all that he wants to, and worries about letting people see how far he can fall from his peak.

Deep Leffen
Deep Leffen and Mang0 appear to have a strained relationship. Deep Leffen dislikes the person that Mang0 has become, writing about how he ‘misses the old Mang0’, and forbidding Mang0 from entering his VIP lounge named "The Mango". However, in times past it appears that Deep Leffen was at least acquaintances with Deep Mang0. Mang0 and Deep Leffen were willing to stream together and Mang0 confided in Deep Leffen something that ‘not many people know about him’.

Skills
Deep Mang0 is an artist of questionable skill. Everyone loves his paintings, but Deep HBox (a historian of art, also of questionable skill) considers them “shit”. He is a highly skilled gamer, at one point being considered the GOAT (greatest of all time) by Deep Leffen. In addition, he starred in the movie ‘Kong: Fight of the Century’ where he uses his super armor to defeat the bad guys. He has a dong and is capable of using a double-barreled shotgun, although it's questionable whether it actually applies to him or to Deep Hungrybox.

Appearance in Court
Mang0 appears in the Deep Leffen goes to Court arc as a witness for team Deep Leffen. He wears a shirt that reads "I use my other shirt to wipe my ass" and claims to have confronted Deep Leffen in New Hampshire to convince him to end his career. After confessing guilty to his crime of "grand theft smash" and saying that he was going on a temporary hiatus from Smash, the judge lets him go, but forestalls his attempt to take a break from Smash, declaring that he must attend every major tournament for the next 10 years as 'community service'.