| manga debut = {{chapter|Yu-Gi-Oh! R|1|ref}}

* [[Gekko Tenma]] (twin brother)

'''Yako Tenma''' is the main antagonist of ''[[Yu-Gi-Oh! R]]''. He is the protégé and adopted son (often mistaken, or mistranslated as younger brother) of [[Maximillion Pegasus|Pegasus]], and the biological twin brother of [[Gekko Tenma]], who wants revenge for Pegasus' death and disappearance, although unbeknownst to him, it was actually [[Yami Bakura]] who killed him. He was always known as the less superior of the two Tenma brothers, constantly being defeated by [[Gekko Tenma]]. Yako appeared to have acquired an inferiority complex from his treatment by others. [[Pegasus]] however, seemed to be the only one who recognized he had potential, and that he'd develop into a great Duelist someday. He believes that [[Yugi]] killed Pegasus, and even when Gekko tells him that what [[Keith Howard]] told him is false, he said that "the reason Pegasus got killed is because Yugi won against him." Tenma's name comes from "Pegasus", which can be translated into Japanese as "Tenma", or 天馬.

|[[Yami Yugi Mutou]] || [[Yu-Gi-Oh! R - Chapter 001|1Dark Yugi]]-/[[Yu-Gi-Oh! R - Chapter 002|2]] || No result|- Yugi Muto|[[Yugi Mutou]] || [[Yu-Gi-Oh! R - Chapter 009001|91]]-[[Yu-Gi-Oh! R - Chapter 011002|112]] || No result

|[[Yami Yugi|Dark Yugi]]/[[Yugi Muto|Yugi Mutou]] || [[Yu-Gi-Oh! R - Chapter 037038|3738]]-[[Yu-Gi-Oh! R - Chapter 044|44]] || Lose

Yako uses a '''[[Wicked God|Devil God]] [[Deck]]'''. Some it focuses on [[Level]] modification tactics to bring out multiple [[monster]]s, which he can [[Tribute]] for the Summoning of the Devil Gods, particularly "[[The Wicked Avatar]]". Many of his monsters he uses are named after well known [[wikipedia:Goetia |Goetia]] demons. Seto Kaiba further describes Yako's deck as utilising 'Level Trick tactics' in chapter 43.

|normal monsters =<u>Normal Monsters</u>

}} ===Gekko==={| style="float:right;" border="1" width="30%"! colspan="3" style="background: #00FF00; text-align: center;" | Record|-! Opponent(s)! Chapter(s)! Outcome|-|[[Yami Yugi|Dark Yugi]]/[[Yugi Muto|Yugi Mutou]] || [[Yu-Gi-Oh! R - Chapter 009|9]]-[[Yu-Gi-Oh! R - Chapter 011|11]] || Lose|} In order to test the powers of "[[The Wicked Dreadroot]]", Yako possesses his twin brother [[Gekko Tenma|Gekko]] and forces him to Duel [[Yami Yugi|Yugi]]. The Deck focused on [[swarm]]ing the [[field]] with "Seraphim" [[monsters]]s in order to bring out "Dreadroot", while countering the opponent with cards such as "[[The Selection|Triage]]". {{Decklist||effect monsters =* [[Seraphim Blaster]]* [[Seraphim Gardna]]* [[Seraphim Saber]]* [[Summoner Monk|Summon Priest]]* [[The SelectionWicked Dreadroot]]|spells =* [[Divine Evolution]]|traps =* [[Shadow Shield of Illusion]]

 ==Notes==<br references group=Notes />