Mammothman first appeared at Kinnikuman's coronation, where he prevented Kinnikuman from attacking Super Phoenix, his master. In the first round of the tournament, he quickly showed his power by slaughtering Kinnikuman Big Body's entire team, but tied on purpose with Cannonballer to allow Super Phoenix to be the one to fight Big Body. Mammothman next saw action in the six-man match between team Super Phoenix and Team Soldier. In a clash of titans he singled out Buffaloman and the two eventually engaged in a battle of possession of Soldier's Muscle Prophecy page. Buffaloman eventually took him out with a Buffalo Bomb but soon after fell to his death into the canyon below. When Mammothman regained consciousness he took the page and threw it into a torch, causing Soldier to begin disappearing. Later, after learning of Warsman's training to defeat the Big Tusks, Mammothman ambushed Warsman forcing him to drop out of the finals.  Mammothman's final battle was in another six-man match against Kinnikuman, Neptuneman (disguised as The Samurai) and Robin Mask. For the most part, Mammothman fought Robin, doing a number on the hero with his blood-seeking tusks. To make the fight "more interesting," Super Phoenix started to burn the pages of both of the choujin from the Muscle Prophecy book. The pages' destruction was akin to the choujin never having existed. Robin, master strategist as always, deduced the weakness of the tusks and spilled blood onto Mammothman himself. His tusks turned against him and impaled Mammothman. Robin defeated Mammothman with a Rope Work Tower Bridge. Both, however, disappeared with the immolation of their prophecy book pages, Mammothman crying his hatred for everyone assembled. 

Kinnikuman (a.k.a. Kinniku Suguru) is a cowardly, clumsy, moronic, gyuudon-devouring excuse for a superhero (or Choujin)... who just happens to be the prince of an alien planet. But despite his pathetic appearance, he is very honorable and can become quite powerful when he needs to be. With his sidekick Meat-kun and fellow Choujins Terryman and Ramenman there to help him, Suguru quests to become the greatest Choujin on the planet. Whether with a combination of tremendous heart and stamina (The Burning Inner Strength) or the "Power of Friendship", Kinnikuman frequently defeats villians 10 times more powerful than him and often causes his enemies to have a change of heart and join him. Though he seems destined to be an idiot forever, slowly but surely Kinnikuman becomes worthy of the title "Hero". 
 
Notes: 
- Between volumes 36 and 37 publication there's 22 years gap. From volume 38 onwards starts restarted in 2011 version. 
- Kinnikuman won the 30th Shogakukan Manga Award for best children's manga in 1984.

After the terrible battle against the Demon Seeds peace has been restored and thus Mantarou is wasting his time away sleeping around, like usual... Suddenly he has a weird dream of him fighting a tag match against the Original 'Machine guns' team (Kinnikuman x Terryman tag team)... Even weirder is that the machine guns aren't 60 something, but are instead in their top form at their finest age, as they where when they won the universal tag team championship... Could this weird new vs old dream mean something? 
As he awakes from his afternoon nap, Mantarou realizes that there are some evil beings floating around the sky that call themselves Time Choujins, after sending a weird challenge they just banish in thin air without leaving a trace.

Kinnikuman has proven himself worthy to be crowned the next king of Planet Kinniku. But at the ceremony, five other Kinnikuman's arrive, all claiming to be the true prince of Planet Kinniku. Now, a Royal Survivor Tournament is being held to decide the true successor to the throne, and with the help and support of his friends and with his recently acquired knowledge of the Ultimate Technique (The Muscle Spark), Kinnikuman fights for what is rightfully his.

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