DOOD-JP006 Gouki Mashin Suprex
Level 4 EARTH Warrior Tuner Effect Monster
ATK 1800
DEF 0
You can only use the (1)st and (2)nd effect of this card’s name each once per turn.
(1) You can reveal this card and 1 other “Gouki” monster in your hand; Special Summon both, but you cannot Special Summon while you control either of those monsters, except “Gouki” monsters.
(2) If this card is sent from the field to the GY: You can add 1 “Gouki” card from your Deck to your hand, except “Gouki Mashin Suprex”.

Note: This card is likely a reference to Junji Harata, i.e. “Super Strong Machine”, whose signature move is the 魔神風車固め（マシーン・スープレックス・ホールド）”Devil Windmill Suplex”/”Machine Suplex Hold”.

DOOD-JP036 Gouki The Tyrant Ogre
Level 8 EARTH Warrior Fusion Effect Monster
ATK 3500
DEF 0
Materials: 1 “Gouki” Link Monster + 1 Warrior, Dinosaur, or Cyberse monster
You can only use the (1)st effect of this card’s name once per turn.
(1) If this card is Fusion Summoned: You can target cards on the field, up to the total Link Ratings of the “Gouki” Link Monsters used as material; destroy them. If you used a Link-3 or higher monster as material, those cards cannot be activated in response to this effect’s activation.
(2) If this card battles, your opponent cannot activate card or effects until the end of the Damage Step.

DOOD-JP041 Gouki Dragon Ogre
Level 6 EARTH Warrior Synchro Effect Monster
ATK 2200
DEF 0
Materials: 1 Tuner + 1+ non-Tuner monsters
You can only use the (1)st and (2)nd effect of this card’s name each once per turn.
(1) If this card is Synchro Summoned: You can add 1 “Gouki” Spell from your Deck to your hand.
(2) If this card is sent to the GY: You can target 1 EARTH monster you control; add 1 “Gouki” monster with lower ATK from your GY to your hand, also, while the targeted monster is face-up on your field, your opponent’s monsters can only target that monster for attacks.

Note: This card is likely a reference to “Tatsumi Fujinami”, i.e. “The Dragon”, a famous Japanese Professional Wrestler, and is credited for inventing the Dragon Suplex and Dragon Sleeper.

DOOD-JP050 Gouki Sheik Ogre
Link-2 EARTH Warrior Link Effect Monster
ATK 1900
Links: Bottom Left; Bottom RightEarth Warrior/Link/Effect
Materials: 2 “Gouki” monsters
You can only use the (1)st and (2)nd effect of this card’s name each once per turn.
(1) If a “Gouki” monster(s) is added from the Deck to your hand, except by drawing it: You can Special Summon any number of “Gouki” monsters from your hand with different Levels from each other, but you cannot Special Summon while you control any of those face-up monsters, except “Gouki” monsters.
(2) During your Main Phase: You can Fusion Summon 1 “Gouki” Fusion Monster from your Extra Deck, using monsters from your hand or field as material.

Note: This card might also be a play on Seek as Go sought the Ignis as a mercenary working for SOL Technologies.

The card itself is a reference to Edward George Farhat, i.e. The Sheik, a famous pro wrestler. The card’s use of fire, for some reference, is referencing a Flame Tag-Team Death Match with his nephew Sabu against Atsushi Onita and Tarzan Goto. The Sheik suffered third degree burns and nearly died, going into a coma.

Or the fact Sheik was notorious for basically creating impromptu flamethrowers in matches.

DOOD-JP056 Gouki Toukon (Gouki Fighting Spirit)
Continuous Spell
You can only activate 1 card with this card’s name per turn. You can only use the 2nd effect of this card’s name once per turn.
(1) When this card resolves, you can Special Summon 1 Level 4 or lower EARTH monster (Warrior, Dinosaur, or Cyberse) from your hand in Defense Position.
(2) You can Tribute 1 Link-3 or higher “Gouki” monster; Special Summon 1 “Dinowrestler” or “G Golem” monster from your Deck or Extra Deck.

Note: This is a reference to “Pain and Gain”, Go Onizuka’s skill that was called 闘魂 (Toukon) in Japan.

Source: YU-GI-OH!.jp