Shounen fighting is quite possibly the world’s most popular anime and manga sub-genre. Whether it’s Saint Seiya in South America, Naruto in the US, One Piece in Japan, or Dragon Ball around the world, the idea of heroes fighting villains and getting stronger along the way is an idea just about any boy in any country can understand and get behind. But one of the common problems with shounen is the idea of the “power creep,” where newer and more powerful villains keep appearing to challenge the hero to the point that the earlier villains who once appeared legitimately threatening begin to look pathetic by comparison. Tao Pai Pai in Dragon Ball may have been one of the few capable of defeating Goku early on, but by the time Goku turns Super Saiyan 3 the assassin is little more than a distant memory.
I think all shounen fighting series creators are well aware of this danger, but only some try to circumvent it, at least temporarily. As such I’ve included a few examples of attempts to quell the Power Level beast.
The first two series of JoJo’s Bizarre Adventure had some degree of power creep, but starting with the third and most popular series starring Kujou Joutarou the series became about outwitting the opponent instead of outpowering them. Here, characters were given their own power sets which changed little to none over the course of the entire series, and all advancements came from figuring out new ways to use abilities already known to the readers, instead of acquiring entirely new powers.
Hokuto no Ken saw fit to make its main hero Kenshiro already absurdly powerful. Kenshiro is not a youth who needs to learn the ways of fighting and to live up to his potential, but a man who already has received the title of master of the world’s deadliest martial art. As such, Kenshiro’s victories are generally won through willpower and using the right moves in his encyclopedic collection of head-exploding strikes. The other move Hokuto no Ken makes is to establish its main villain Raoh relatively early and make him a proper end boss, and also establishing the fact that as far as fighting ability goes, both Kenshiro and Raoh are at similar levels. Even when the series goes crazy with Kaioh and such, this is never quite a problem.
Digimon Adventure 02 saw a problem when it realized that, if left the way things were, the already powerful Angemon could just go Ultimate and leave an unfortunate stain where the evil Digimon Kaiser (Digimon Emperor in the English dub) was once standing. To get around having to make the villain more absurdly powerful than the final opponents in the first series, the concept of the “black rings,” devices which prevent digital monsters from evolving, was created. The solution was that the heroes had to find an alternate means to “power up” which, while incapable of reaching their old heights, gave them a fighting chance. Eventually they overcame the Digimon Kaiser and new villains appeared, but at least for a time the shounen power creep was stayed.
Those are three examples. Can you think of any others?