White Gate Keys are required to Duel him at the Gate.
He appears in-game after the player reaches Stage 6 of Duel World (5D's), at which point his Character Unlock Missions become available. Prior to September 22, 2021, he could only be unlocked in the special eventClear Mind: Antinomy the Mysterious Turbo Duelist. Prior to being made available as a playable character, he appeared as an opponent during the event Mysterious Turbo Duelist is here!.
Yusei's mysterious mentor is actually Bruno, Team 5D's chief mechanic. As Antinomy regains his memories, he remembers that he comes from a post-apocalyptic future, and he has traveled back in time to change it. He challenges Yusei to a Duel to open Yusei's mind to new new Dueling skills he has never known before.
When starting a Duel with Yusei Fudo, Antinomy announces "Yusei, you'll never beat me until you exceed your limits!"
When he wins the Duel, Antinomy says "This is the power beyond Synchro!" or "What's wrong, Yusei? Your fear is holding you back!"
When he loses the Duel, Antinomy says "Yusei, you proved why I believed in you." or "Yusei, you're my hope for a better future." followed by "A future that shines brighter than my Accel Synchro."
Before Antinomy Synchro Summons "T.G. Halberd Cannon", he announces "Top Clear Mind! Remove max limiter! Open regulators! All systems are go! Infinite Power will create a new future! Go! Delta Accel!" When Antinomy summons "T.G. Halberd Cannon" (by any method), a cut-in frame of Antinomy briefly appears and he announces "C'mon, T.G. Halberd Cannon!" If the player has not yet summoned "T.G. Halberd Cannon" this game, a cutscene of "T.G. Halberd Cannon" being summoned is played.
Most of the time when Antinomy declares an attack with that monster, he announces "Attack, T.G. Halberd Cannon!"
When Antinomy activates that monster's Quick Effect, he announces "T.G. Halberd Cannon! Stop that monster from being summoned! Closed Summon!"
Before Antinomy Synchro Summons "T.G. Blade Blaster", he announces "Clear Mind! Remove level 10 limiter! Main booster controls are a go! Step out of the shadows and into the light! Accel Synchro!" When Antinomy summons "T.G. Blade Blaster" (by any method), a cut-in frame of Antinomy briefly appears and he announces "Go, T.G. Blade Blaster!"
Most of the time when Antinomy declares an attack with that monster, he announces "Attack, T.G. Blade Blaster! Blasting Blade!"
When Antinomy activates that monster's first effect, he announces "By discarding a card, Blade Blaster negates a Spell or a Trap!"
When Antinomy activates that monster's second effect, he says "Blade Blaster's effect activates! I banish a T.G. from my Graveyard to banish this card!"
When Antinomy activates that monster's Trigger Effect, he announces "Blade Blaster returns to my field during the Standby Phase!"
Before Antinomy Synchro Summons "T.G. Wonder Magician", he announces "Remove Level 5 Limiter! Launch boosters! Systems are go! Synchro Summon!" When Antinomy summons "T.G. Wonder Magician" (by any method), a cut-in of Antinomy's face briefly appears and he announces "Here's T.G. Wonder Magician!"
Most of the time when Antinomy declares an attack with that monster, he announces "Attack, T.G. Wonder Magician! Machine Sorcery!"
When Antinomy activates that monster's first effect, he says "Wonder Magician can destroy a Spell or a Trap!"
When Antinomy activates that monster's second effect, he says "When Wonder Magician is destroyed, I draw a card!"
When Antinomy activates that monster's Quick Effect, he says "Watch as I unlock the true power of Synchro Summoning!"
Before Antinomy Synchro Summons "T.G. Power Gladiator", he announces "Flight control! Remove Level 5 limiter! Boosters at 120%! Recovery network fixed! All systems are go! Synchro Summon!" When Antinomy summons "T.G. Power Gladiator" (by any method), a cut-in of Antinomy's face briefly appears and he announces "C'mon, T.G. Power Gladiator!"
Most of the time when Antinomy declares an attack with that monster, he announces "T.G. Power Gladiator, show them the might of your axe! Machine Slash!"
When Antinomy Summons "T.G. Striker", he announces "T.G. Striker!"
When Antinomy activates that monster's effect, he says "T.G. Striker lets me add a T.G. in my deck to my hand!"
When Antinomy Summons "T.G. Rush Rhino", he announces "T.G. Rush Rhino!"
Most of the time when Antinomy declares an attack with that monster, he announces "Attack, T.G. Rush Rhino!"
When Antinomy activates that monster's effect, he says "Rush Rhino adds another monster in my deck to my hand!"
When Antinomy Summons "T.G. Catapult Dragon", he announces "T.G. Catapult Dragon!"
Most of the time when Antinomy declares an attack with that monster, he announces "Attack, T.G. Catapult Dragon!"
When Antinomy activates that monster's effect, he says "Catapult Dragon Special Summons a T.G. Tuner!"
When Antinomy Summons "T.G. Jet Falcon", he announces "T.G. Jet Falcon!"
Most of the time when Antinomy declares an attack with that monster, he announces "Attack, T.G. Jet Falcon!"
When Antinomy activates that monster's effect, he says "By Synchro Summoning, Jet Falcon's effect activates!"
When Antinomy Summons "T.G. Screw Serpent", he announces "T.G. Screw Serpent!"
Most of the time when Antinomy declares an attack with that monster, he announces "Attack, T.G. Screw Serpent!"
When Antinomy activates the first effect of that monster, he announces "T.G. Screw Serpent's effect activates!" followed by "I Special Summon a Level 4 or lower T.G. from my GY!
When Antinomy activates the second effect of that monster, he announces "Screw Serpent's effect activates from the GY!"
When Antinomy Summons "T.G. Tank Grub", he announces "T.G. Tank Grub!"
Most of the time when Antinomy declares an attack with that monster, he announces "Attack, T.G. Tank Grub!"
When Antinomy activates the effect of that monster, he announces "T.G. Tank Grub's effect activates!"
When Antinomy Summons "T.G. Warwolf", he announces "T.G. Warwolf!"
Most of the when Antinomy declares an attack with that monster, he announces "Attack, T.G. Warwolf!"
When Antinomy activates the first effect of that monster, he announces "Since this monster was Level 4 or lower, I can summon this!"
When Antinomy activates the second effect of that monster, he announces "T.G. Warwolf adds another monster in my deck to my hand!"
When Antinomy activates "Synchro Material", he announces "I activate my Trap, Synchro Material!" followed by "I can use your monster to Synchro Summon this turn!"
When Antinomy activates "TG-SX1", he announces "I activate my Trap, TG-SX1!" followed by "I Special Summon a T.G. Synchro Monster from my GY!"
When Antinomy activates ""TG1-EM1", he announces "I activate my Trap, TG1-EM1!" followed by "I swap control of my T.G. with your monster!"
When Antinomy activates "TGX1-HL", he announces "I activate my Quick-Play Spell! TGx1-HL!" followed by "I halve a T.G.'s ATK and DEF destroy a Spell or Trap!"
When Antinomy activates "TGX300", he announces "I activate my Continuous Spell, TGX300!"
When Antinomy activates "Tuner Capture", he announces "I activate my Trap, Tuner Capture!" followed by "I Special Summon a Tuner monster from your GY onto my field!"
When Antinomy activates "Urgent Tuning", he announces "I activate my Trap, Urgent Tuning!" followed by "It lets me Synchro Summon a Synchro Monster!"