The_Authority said:
Never happens?
Any time the protagonist is losing, suddenly something happens -- usually a cop-out like drinking water or training for a minuscule amount of time or a transformation or some sort of power boost out of nowhere -- where suddenly the protagonist overshadows the villain by a mile. Then, suddenly, the villain does something -- usually a cop-out like "Hey, I wasn't full power!" -- and now the villain is on-par with the protagonist, and then the clash happens, and the protagonist overcomes. This is the formula (at least partly) for every single big Dragon Ball Z battle.
That in fact is not true. Let's analyse each DBZ battle:
vs Raditz: Goku and Piccolo are completely dominated by Raditz. The only rageboost is the one from Gohan.
vs Nappa: Gohan has a rage boost, but it's not decisive nor helps to turn the tides of the battle. In other words, it's not comparable to what you describe.
vs Vegeta: Goku weakens after the KKx4. From there, it's all about Krilin, Gohan and Yajirobee decimating Vegeta with what they got (and Goku's Genkidama). Not a single power up that changed the tides of the fight.
At Namek, we have:
Vegeta vs Kiwi: Vegeta powered up before arriving at Namek, there wasn't a single power up in that fight.
Vegeta vs Dodoria: Same as before, not a single power up.
Vegeta vs Zarbon: Zarbon transformed and Vegeta lost. I wouldn't say Zarbon's transformation is part of that formula since that's how the character was conceived and Vegeta couldn't turn the tables again.
vs Ginyu force: Guildo is killed by a cheap shot from Vegeta. Reecome beat Vegeta and then him and Burter were beaten by Goku. When Ginyu appeared even the KKx2 was enough to clearly overpower him, so no magic power boost out of nowhere again.
vs Freezer:
No power ups in his 4th form.
A rageboost for Gohan vs his 3rd form and another one vs his 2nd form, but they weren't decisive rage boosts by any means and the situation was resolved through other means.
Goku vs Freezer had a rage boost, the first and only rage boost for a character that's not Gohan that happened in a fight and helped to resolve the situation.
The second of 3 power boosts in a fight that really affected the battle where it happened in all of DBZ.
Androids:
vs 19: No power boosts of any kind. In fact, Goku is constantly losing energy because of the disease and ends loosing.
vs 19 2.0: Vegeta decimates him.
vs 20: No power boosts again, Piccolo dominates.
vs 18: Again, no power boosts of any kind. Vegeta and 18 start more or less equally and then 18's unlimited stamina gives her a decisive victory.
vs Cell: No power boosts as well. Piccolo dominates.
vs 17: Again, no power boosts that turned the battle. Piccolo started being a bit above 17 but it wasn't enough to overcome the android's unlimited stamina.
vs Cell 2.0: Cell dominates, no power boosts of any kind.
vs 16: An even fight but 16s unlimited energy would've given him the victory. Cell had to absorb 17 as a means to surpass 16, but that's not that "magic power up" you were speaking of. We already knew from dozens of chapters ago that Cell would power up if he managed to absorb 17.
And seriously, besides Gohan vs Perfect Cell there's not a single "bullshit out of nowere power up" in the middle of any fight.
The_Authority said:
Goku's power is insignificant. Vegeta and Nappa overshadow him. Goku gets an insane, like crazy power-up from not doing much, really. Comes back, destroys Nappa, and off to fight Vegeta. Goku's losing, BUT WAIT! He has the Kaio-ken in his arsenal, so he overcomes Vegeta. Vegeta, though, pulls the giant monkey transformation out of nowhere and overshadows Goku. Yes, Goku himself doesn't overcome Vegeta, but there is some cop-out overcoming of the villain when Gohan (out of nowhere) becomes a giant ape and you know the rest.
Look, this is not what you described. I mean, you saying "Goku shouldn't have goten as strong as he did only by training with kaito" is just your opinion, not bad writting as you implied.
We knew about the KK even before Goku started to fight Nappa, so no, it's not a "Goku is overshadowed but suddenly gets a magical technique" because we knew Goku could use the KK before he even started to fight.
Look, what you described was One Piece. It's in One Piece where drinking water fills your stamina, or where the concept of losing stamina isn't even considered and things goes just like the author wants them to go.
And this doesn't happen in DB except for the rage boosts.
The_Authority said:
Vegeta's entire run-through of Freeza's men on Namek was akin to this. Vegeta was weaker, but oh my goodness, was now magically stronger.
Even to go so far as to be beaten by Zarbon, only to heal up and overshadow him. How? This magical thing where he gets a power-up from being nearly dead. How convenient. And he even ends up killing Jheese somehow. How? Nobody knows. All we can do is lean on that magical and convenient explanation of "Well, the Zenkais!"
The zenkai power was introduced before Vegeta arrived at Namek... so even if it was convenient, it wasn't something the author invented just for the sake of beating Zarbon.
Those are rules that the author established far before a situation that needed them appeared, or in other words, Zarbon was as strong as he was because Toriyama already had given himself a tool for Vegeta to surpass him.
That has nothing to do with being coherent when designing the fights. And DB fights are the most accurate of any shounen I've ever read.