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Anime and Manga
- Justified in Busou Renkin. Using a different kakugane from your normal one just produces the same busou renkin with different styling. Likewise homunculi can't gain new powers; all they can do is train to use the ones they already have more effectively. Subverted with Kazuki, whose kakugane is eventually revealed to be a special black kakugane that produces a new busou renkin with different abilities.
- One Piece has a good example, too: Similar to the Busou Renkin example above, Devil's Fruit abilities are stated to never get stronger per se, but you can discover new and better ways to use them. It is also a rule that you can only use one, that you'll die if you try to gain a second, but Blackbeard seems to have found a way around that.
- Played straight by most of the eponymous warriors in Claymore, who develop their special yoki techniques early in their careers and rely mainly on them for the rest of their lives. Completely averted, however, by the main heroine, Clare, who keeps picking up various techniques as the story progresses and thus gets to play in the highest supernatural league despite having relatively weak yoki potential.
- Possibly justified, since most warriors with signature techniques are powerful enough to not encounter opponents that would necessitate improvement. In general, the trope is averted by the Seven Ghosts, due to their 7 years' time hiding and training: Miria develops a less youki-based phantom technique, ridding herself of the number-of-uses restriction she had before; Helen learns Jean's drill sword technique, building off of her own extendible arm technique; Deneve adopts Undine's dual-wielding combat style, supplementing her amazing recovery powers; Tabitha gains youki-sensing abilities akin to "God-Eye" Galatea; Cynthia learns the youki-synchronizing technique and develops a healing technique; Yuma gets good at throwing swords like javelins, and many chapters later is also able to learn Cynthia's healing technique; and Clare, as mentioned above, gains a variety of techniques throughout the series. Other than that, however, almost no introduced characters develop their abilities or styles, or adopt new ones.
- Batman is the head of Wayne Enterprises, has fought against and alongside many superpowered beings that possess advanced technology, use magic, and have reliable and effective mutagens. Despite this, he has been, and most likely always will be, only a mere Badass Normal Crazy-Prepared genius detective.
- Superman has a weakness to Kryptonite. He also has a Kryptonite-Proof Suit. You'd expect him to wear it pretty much all the time or at least line his costume with lead to reduce the effects. However, he brings it out only when he's fighting a villain that specifically uses Kryptonite as a weapon and expects it in advance.
- Its because the suit is fragile relative to the power levels of Superman and many of his foes.
- What he has done on more than one occasion is try to get rid of the Kryptonite since its supposed to be rare but more just keeps showing up.
- Barbara Gordon becomes crippled by The Joker in The Killing Joke, and remains crippled from then on until the New 52 reboot. This is despite the fact that people with superpowers that can heal any injury, Powered Armor, Magic, and others exist all over the DC Universe that can fix or replace her legs with but a phone call. In fact, Batman himself had his spine broken in Knightfall, but quickly recovered. This is given the somewhat hamfisted justification that Barbara deliberately refuses to embrace the metanatural options she has for undoing her spinal damage because she doesn't want to be "special" compared to all the other crippled humans in the setting. Even after she is forced to be cured, she is shown wangsting over it.
- Similar to the above, Professor Xavier is in much the same boat. However, unlike Barbara and most examples of this trope, he has tried many times to restore the use of his legs, but when he does succeed, he becomes crippled again before long.
- Most times that a superhero or supervillain is held prisoner, there is a Power Nullifier in action. Most of the prisoners find a way to get rid of them, but they seem to work well in their original purpose. So, what about the heroes who want to be normal? There is an easy way for Cyclops to get rid of the sunglasses, for the freaky-looking mutant to seem like a regular joe, or for Rogue to have a lot of sex: just try the new mutant trend, the power-nullifier collar, and do as you want! And if you need your powers for something, just take off the collar and that's it. Usually justified as paranoia about how an individual could hack or steal the nullifier and use it against the super when they need it.
- Following The Other arc, Spider-Man acquired enhanced strength, the ability to communicate with spiders, organic webbing, and retractile stingers in his wrists, among other powers. Post-Brand New Day he's gone back to his original powers, and the augmented ones have gone to his clone Kaine. This was justified by the vastly negative reaction Spidey's fans had to his new powerset, which ranged from "nonsensical" (spider-talking, retractile stingers) to "obvious cash-ins on the movies" (organic webbing).
- Strongly averted in Villains Inc. (sequel to Wearing the Cape). Astra finds herself outclassed and consequently follows Ajax' example, leveling up by adding armor to her costume and even using Ajax' maul to increase her ability to Hit Things.
Live Action TV
- One early episode of Angel had the title character acquire a ring that grants vampires immunity to sunlight and makes them all but invulnerable. Wow, Angel, you'd be able to do a lot of good with that ring, wouldn't you? He destroys it by the end of the episode, deeming it "too powerful". Somewhat justified in that Angel had just experienced that: (a) he could have the ring forcibly taken from him by vampires who were perfectly happy to use it for evil, and (b) so long as the ring continued to exist, the bad guys would keep coming for it until one finally succeeded. There's also the threat of him losing his soul and becoming Angelus again, in which case the ring really would be too powerful.
- Averted with inFAMOUS 2. While in the first game Cole is stuck with his lightning powers and nothing else, inFAMOUS 2 allows Cole as part of the storyline to use a machine to copy either fire or ice powers from two other superpowered people, depending on his alignment.