Yu - Gi - Oh ! - Episode 020 " Double Trouble Duel , Part 2 " , known as " Integration of the Three Gods ! Gate Guardian " in the Japanese version , is the twentieth episode of the " Yu - Gi - Oh ! " second series anime . It first aired in Japan on September 5 , 2000 and in the United States on March 23 , 2002 . Summary . In the the Duel , Yugi and Joey bring out their strongest monster s , but the Paradox Brothers use " Magical Labyrinth " to change the shape of the maze and separate their monsters . The Paradox Brothers manage to draw all three pieces of " Gate Guardian " ( " Kazejin " , " Suijin " and " Sanga of the Thunder " ) , their most powerful monster . Meanwhile , as Seto Kaiba approaches Pegasus ' s castle , he is confronted by Kemo , but Kaiba overpowers him and takes him hostage , demanding that he take him to Mokuba . Kemo takes Kaiba through Pegasus ' underground prison , but activates an alarm , forcing Kaiba to flee and find Mokuba himself . Featured Duel : Yami Yugi & Joey Wheeler vs . Para & Dox . Yugi has 1600 LP remaining , and control s " Celtic Guardian " ( 1400 / 1200 ) in Attack Position and no Set cards . Joey Wheeler has 2000 LP remaining , and controls " Axe Raider " ( 2200 / 1150 ) in Attack Position equip ped with " Kunai with Chain " and no Set cards . Para has 1700 LP remaining , and controls no monsters or Set cards . Dox has 2000 LP remaining , and controls " Labyrinth Tank " ( 2400 / 2400 ) in Attack Position , " Labyrinth Wall " and 1 Set card ( " Jirai Gumo " ) . Turn 8 : Joey Joey draws " Flame Swordsman " and subsequently Normal Summons it ( 1800 / 1600 ) in Attack Position . Since " Flame Swordsman " is a Level 5 monster , Joey can move it up to 5 spaces , but he chooses to move it only 4 spaces inside the maze , arriving at the same space as " Celtic Guardian " . He then moves " Axe Raider " inside the maze . Since it is a Level 4 monster , he moves it by 4 spaces . It joins " Flame Swordsman " and " Celtic Guardian " . Turn 9 : Dox Dox draws . He then moves " Labyrinth Tank " another 7 spaces . Turn 10 : Yami Yugi Yugi draws . He then Normal Summons " Dark Magician " ( 2500 / 2100 ) in Attack Position . Since it is a Level 7 monster , Yugi can move it up to 7 spaces , but he chooses to move it only 5 spaces inside the maze , in front of " Celtic Guardian " and Joey ' s monsters . Turn 11 : Para Para draws " Magical Labyrinth " and subsequently activate s it to change the shape of " Labyrinth Wall " maze . " Flame Swordsman " and " Axe Raider " are separated from " Celtic Guardian " and " Dark Magician " . Turn 12 : Joey Joey draws . He then moves " Flame Swordsman " and " Axe Raider " ahead , but " Axe Raider " steps on the space of " Jirai Gumo " , causing it to appear on the field " Jirai Gumo " ( 2100 / 1000 ) in Attack Position and attack " Axe Raider " . Due to the effect of " Jirai Gumo " , the ATK of " Axe Raider " becomes its original ATK during the Damage Step ( " Axe Raider " : 2200 → 1700 / 1150 ) . " Jirai Gumo " destroys " Axe Raider " ( Joey : 2000 → 1600 LP ) . Turn 13 : Dox Dox draws . He then moves " Labyrinth Tank " another 7 spaces , arriving right behind " Jirai Gumo " . He then Sets " Dungeon Worm " . Turn 14 : Yami Yugi Yugi draws " Mystic Box " and subsequently activates it to force " Jirai Gumo " and " Dark Magician " to swap locations and destroy " Jirai Gumo " . " Dark Magician " attacks and destroys " Labyrinth Tank " ( Dox : 2000 → 1900 LP ) . Turn 15 : Para Para draws " Sanga of the Thunder " and subsequently Sets it . Turn 16 : Joey Joey draws . He then moves " Flame Swordsman " five spaces . Turn 17 : Dox Dox draws " Suijin " and subsequently Sets it . He then Flip Summon s " Dungeon Worm " ( 1800 / 1500 ) to Attack Position . He then activates " Invigoration " and equips it to " Dungeon Worm " , increasing the latter ' s ATK by 400 and decreasing its DEF by 200 ( " Dungeon Worm " : 1800 → 2200 / 1500 → 1300 ) . Since it ' s a burrower , " Dungeon Worm " is able to move freely under the maze , bypassing the spaces and attacking any monster . " Dungeon Worm " attacks and destroys " Celtic Guardian " ( Yugi : 1600 → 800 LP ) . " Dungeon Worm " then retreats underground . Turn 18 : Yami Yugi Yugi draws . He then activates " Magical Hats " , hiding " Dark Magician " and " Flame Swordsman " under two of four " Hats " . Turn 19 : Para Para draws . He then Normal Summons " Monster Tamer " ( 1800 / 1600 ) in Attack Position . Due to the effect of " Monster Tamer " , Para can take control of Dox ' s " Dungeon Worm " and increase its ATK by 600 ( " Dungeon Worm " : 2200 → 2800 / 1300 ) . " Dungeon Worm " attacks and destroys a " Hat " , which is revealed to be empty . " Dungeon Worm " then retreats underground . Turn 20 : Joey Joey draws . He then releases his " Flame Swordsman " from the " Hat " it was under . He then activates " Salamandra " and equips it to " Flame Swordsman " , increasing the latter ' s ATK by 700 ( " Flame Swordsman " : 1800 → 2500 / 1600 ) . " Flame Swordsman " attacks " Dungeon Worm " . The Salamandra attack steers itself into the destroyed hat and down the tunnels , allowing " Flame Swordsman " to attack without moving and strike an underground monster . Also , since " Dungeon Worm " is weak against FIRE - Attribute monsters , it loses the ATK bonus from " Monster Tamer " ( " Dungeon Worm " : 2800 → 2200 / 1300 ) . " Flame Swordsman " destroys " Dungeon Worm " ( Dox : 1900 → 1600 LP ) . Turn 21 : Dox Dox draws " Kazejin " and subsequently Normal Summons it ( 2400 / 2200 ) in Attack Position . He then Flip Summons " Suijin " " ( 2500 / 2400 ) and " Sanga of the Thunder " ( 2600 / 2200 ) and combine s them with " Kazejin " in order to form " Gate Guardian " in Attack Position . Turn 22 : Yami Yugi Yugi draws . He then Sets two cards . Turn 23 : Para " Sanga of the Thunder " attacks " Flame Swordsman " . Featured cards . The following cards appeared in this episode . Cards in italics debuted here .