Changes
He did not join the duel until Episode 142.
With the intense pain and his hatred towards the Pharaoh, he spawned his second personality [[Yami Marik]] to deal with it all. Such as a year later when his father brutally tortured Odion for helping Marik and Ishizu to sneak outside, Marik was unconscious while Yami Marik killed his father and woke up with no recollection of his father's murder. Immediately afterwards, he sees [[Shadi|a loyalist to the Pharaoh]], Shadi, had come to warn him about the dangerous path he had taken. Marik thought that Shadi had murdered his father, leading to Marik's betrayal of the clan to get revenge against the Pharaoh (this aspect is removed from the dub).
While leading the [[Rare Hunters]] in his quest for world domination and freedom, Marik became cruel and uncaring, willing to brainwash people to do his bidding, force them to cheat, and use cruelty on his behalf, the victims included [[Bandit Keith]] and [[Strings]]. He was not above using death to punish his subordinates for failure despite them pleading to Marik they tried their best, such as [[Arkana]] and [[Lumis]], nor did he care about sacrificing Rare Hunters to test the fake "[[The Winged Dragon of Ra (anime)|The Winged Dragon of Ra]]" cards which produced severe injuries and death. He even threatened his sister Ishizu with the [[Millennium Rod]] for getting in his way and ordered Odion to use the fake Ra card against his will when was so close to winning against Joey. This may all may stem from his other persona influencing him as when they met during Yami Marik's duel with Yami Bakura, the former said that he caused him to not feel guiltyover his actions. Though He still retained his love for his family, despite his mistreatment of them.
=== Etymology ===
! scope="col" | Outcome
|-
| [[Yugi Muto]] || [[Yu-Gi-Oh! - Episode 050|50]]-[[Yu-Gi-Oh! - Episode 051|51]] || No result (posessing possessing [[Bandit Keith]])
|-
| [[Yugi Muto]]/[[Yami Yugi]] || [[Yu-Gi-Oh! - Episode 065|65]]-[[Yu-Gi-Oh! - Episode 067|67]] || Lose (possessing [[Strings]])
| [[Yugi Muto]]/[[Yami Yugi]] || [[Yu-Gi-Oh! - Episode 075|75]]-[[Yu-Gi-Oh! - Episode 078|78]] || [[DRAW]] (taken over by [[Joey Wheeler]])
|-
| [[Yugi Muto]]/[[Yami Yugi]] || [[Yu-Gi-Oh! - Episode 138|138]]-[[Yu-Gi-Oh! - Episode 142|142]] || Lose (taken over from [[Yami Marik]])
|}