[[folder:Board Games]]
* TabletopGame/{{Chess}} has two examples:
** The humble pawn, which upon reaching the last rank on the chessboard gets promoted, almost always into a Queen, the most powerful piece in the game
** The Queen herself. Initially the piece was known as the vizier and moved very similarly to a pawn (i.e. it was much weaker than a king, which can at least cover all eight squares around it). Then, during the 15th or 16th century, it was given it's current movement [[TookALevelInBadass abilities]] and, well, there's a reason the pawns tend to get promoted to queens.
*** This upgrade (orthogonal and diagonal travel without limit where unobstructed) became tellingly known as "madness chess" ("That much power wielded by ''a woman''? [[TitleDrop Madness!]]") and the Italians called the piece ''rabioso''.
*** If it comes to that, the ancient bishop was even weaker, moving diagonally two squares ''exactly'', which restricted it so that 56 of the 64 squares were permanently off-limits.

[[folder: Manwha]]
* Shi Woon, protagonist of ''Manhwa/TheBreaker'', takes several huge levels in badass over the course of the story. He starts out as a loser who gets beaten up by bullies daily. After he eats [[AWizardDidIt a strange pill]] and trains under one of the greatest martial artists in the world, he becomes strong enough to break a cement column with his bare hands and take on other more experienced martial artists. He also learns to stand up for himself and becomes TheDeterminator, which impresses even the antagonists he cannot defeat.

* Elefseus in Music/{{Sound Horizon}}'s Moira. After his sister is killed, he turns into Amethystos, prince of taking down fate.
* Paul [=McCartney=]'s ''Live and Let Die'' says that "you used to have a heart like an open book and say live and let live, but if this world in which we're living makes you cry...say live and LET DIE!!!" BreakTheCutie into Badass.
* {{Music/Katy Perry}}'s ''Roar'' is about a girl who starts as a love interest to a boy, but after breaking up with her boyfriend goes on to become a strong independent woman. The video goes one step further as Katy plays a city girl whose plane crashes in the jungle, and when her [[Franchise/IndianaJones Indiana-expy]] boyfriend is eaten, she levels up into a JunglePrincess.
* Perry again, in the ''Part of Me'' music video, starts as a heartbroken woman who just broke up with her cheating boyfriend. She joins the US Marine Corps and transforms into a badass soldier.
* "Chainsaw Earle" by Newfoundland folk/comedy band Buddy Wasisname and the Other Fellers tells of the eponymous Earle, a scrawny weakling who grew up in a town full of lumberjacks. Too weak to even lift up a chainsaw, he was despised and mistreated by everyone until [[ScrewThisImOuttaHere he got fed up and left town]]. He returns 16 years later as an enormously muscled giant carrying a {{BFS}}-sized chainsaw and pulls a BigDamnHeroes, saving the town from burning down in a raging forest fire. [[spoiler:He then burns it down ''himself'' by accident, because even though he got a lot bigger and stronger, he's still just as ''stupid'' as he was before.]]

[[folder:Newspaper Comics]]
* ''ComicStrip/DickTracy'' had Pat Patton, who was originally a BumblingSidekick for Tracy in the first few years. However, before the 1930s ended, Pat grew to be a hardheaded and reasonably efficient police detective who can find the important clues and save the day when called upon.

* In ''VideoGame/MetroidPrime'', the Triclops was a minor annoyance that just latched onto the Morph Ball and spit it out for minor damage. But in ''VideoGame/MetroidPrimePinball'', it's a major problem due to its tendency to release Samus at an unfortunate angle.

[[folder:Puppet Shows]]
* Parodied in ''Film/TeamAmericaWorldPolice'' with the "montage" song.

* Happens all the time in sports, especially when a team goes "worst to first". Very common in UsefulNotes/{{Baseball}}.
** Happened to TWO teams in 1991, when then-perennial losers the Minnesota Twins and Atlanta Braves, met in the World Series. The Twins won it all last year, but the Braves would go on to be a force ''for the next 15 seasons'', ultimately winning it all in 1995.
*** This is particularly important for Braves fans; it signalled the end of the "rotten years", a period from 1970 through 1990 where they lost a lot more often than not, only making the playoffs two years out of 21.
** The Tampa Bay Devil Rays were...[[{{Understatement}} slow out of the gate]], having losing seasons their first ten seasons, finishing DFL in the AL East nine times out of ten (they finished 4th out of 5 in 2004). Then in 2008, they dropped "Devil" from their name. They immediately won the AL East (keeping the Yankees out of the playoffs), then beat the Red Sox in the ALCS to make the World Series. They've had winning seasons ever since, making the playoffs in 2010, 2011 and 2013.
* As a player example, Patty Mills of the San Antonio Spurs basketball team. During the 2012-2013 postseason, he was widely known as the chubby guy sitting on the bench, [[TheHeart cheering his teammates on]] by enthusiastically waving a towel whenever they scored a basket. After his team lost the championship, he was determined to prove that he deserved time on the court, so he went on a strict diet, lost weight, and trained rigorously. Flash forward to the 2013-2014 season, and he's been absolutely killing it as the backup point guard, helping the Spurs to maintain their top-seed record by stepping in for the injured Tony Parker and going off for ''30 points or more'' in his best games -- a number that would be considered respectable for superstars like Kevin Durant and [=LeBron=] James.
* It didn't matter whether they played in Buffalo (as the Braves), San Diego, or Los Angeles -- the Clippers were a running joke for most of their first four decades in the NBA. They had a penny-pinching, uncouth owner in Donald Sterling, an established reputation for losing, and an inability to hang on to top players, who would either be traded away in bad deals, or leave via free agency once their contracts expired. But when 2009 first-overall pick Blake Griffin debuted in the 2010-11 season (he missed what would have been his rookie year due to injury), things began to turn around. And when the Clippers acquired Chris Paul via trade ahead of the lockout-shortened 2011-12 season, Lob City was born. As of 2016, the Clippers have finally become consistent winners, and become the top NBA team in L.A. after decades of playing a poor second fiddle to the Lakers.

* As with the cartoon series, so too with the toy line it's based on. When Transformers makes a new toy of an old character, the advances in manufacturing technology usually mean the toy itself is better. It is also often larger. Recent examples include Seaspray, once the Comicbook/{{Aquaman}} of the Autobots, who has a toy that is apparently both his [=G1 character=] and a character for the new line, going from an equivalent of Legends to Voyager (three size steps up; the original is three inches tall while the new one is over a foot.) This can even happen within a single line. In the ''Film/TransformersRevengeOfTheFallen'' toy line, Bludgeon was originally a repaint of Wreckage, a decent mold from the first movie's line, but got his own unique mold which was a full size class larger, more in tune with his fan-favorite [=G1=] self, and dripping with flavor.
* Mata Nui from ''Toys/{{Bionicle}}'' seems to go down a few levels of badass at first, after which he explains that he never actually was that badass, just very powerful. Then he throws a HumongousMecha under a moon/fragment of the planet he's standing on, crushing the BigBad.