No, if the things that have been going on on this show as a matter of routine for years are considered "bad writing" and you're still watching, complaining, critiquing, and expecting drastic change after all this time, then that says more about you then it does the quality of the writing. There are things that can be critiqued, and then there's arguing against a world that has been established for many years now. It operates under one set of rules, and you want it to change that set of rules to fit your view on how that world should operate. It's not going to happen.
Umm.
I'm sorry give me ONE example of ANY Pokemon that hatched, and didn't do anything for nearly 30 episodes and evolved on said 30th episode on the team.
You can't. Because there is no example.
Every single Pokemon that has hatched except Noibat has received more than enough focus to justify evolution.
The evolution examples that exist only apply to a normal Noibat, not a hatched Pokemon. That's why it is BAD writing.
I could understand why Phanpy evolved, Dawn's Cyndaquil evolved, Brock's Happiny evolving. And if Ash's Scraggy evolved it would've made sense because it had been on the team for longer than 30 episodes and had PLENTY of focus episodes. In fact remaining unevolved may have hurt Scraggy since it did end up still being the weakest member of Ash's team.
Nothing can apply to baby Noibat perfectly because Noibat is a different case altogether. It's like Ash capturing Gible for the first time. There are no rules to how Ash trains a dragon type, so here's Gible.
Half-assed approach:
1. Pokemon learn moves off screen. Here's Noibat, it developed off screen.
2. Pokemon have evolved REALLY quickly with no training, they were normal Pokemon not baby Pokemon, but here's a half justification for Noibat.
3. Some Pokemon have hatched strong, Phanpy and Cyndaquil, but then there are those Scraggy examples. But let's only give Noibat supersonic (a move I wouldn't have given it, screech made more sense honestly) so its like Scraggy but also its strong just because. Ready for evolution.
All hatched Pokemon received focus on screen before they potentially evolved, while some didn't evolve at all.
The Pokemon that didn't have any focus before they evolved, were normal Pokemon and could easily seen as being close to evolution when they were caught.
The best example I can think of is Gligar, who could've easily been seen as immature, but it did receive onscreen focus for a few episodes, and was heavily focused on its evolution episode. And had a different evolution mechanic than Noibat. Gligar could easily evolve like a stone evolution because that's how the anime treated the specific item specific time of day evolution that Gligar's evolution was.
BUT at least it did DO something.
Noibat hasn't DONE anything at all for most of the time its been on Ash's team.
So yes it is bad writing. And just because this is an example for future examples, doesn't mean they aren't bad writing either. If it starts as bad writing throwing many similar examples after the fact doesn't lessen how bad it is to begin with.
Being an established plot device does not mean it isn't bad writing. I don't know of anyone who would ordinarily be so involved in a story, and a plot device was created very early, and established couldn't possibly be left with a bad taste when it actually happens.
For example, let's say that there's prophesy that this person in the future will become the greatest hero. Established very early. But then you have this character do absolutely nothing to grow as a character, and then suddenly it becomes this powerful entity that defeats the great big bad villain.
That little paragraph can easily be viewed as bad writing even though it makes sense. The character was prophesied to be a powerful entity that could defeat the great evil.
The problem is that the power SUDDENLY fell into the character's lap.
I've been taught if you are going to write a story that focuses on a character and that character is powerful. YOU NEVER EVER, just let it fall into that character's lap.
Story writing 101. Your character has to have flaws, your character has to grow, and develop, has to "EARN" it's great power, has to show that its worthy of that power, that it has earned it, in order to classify it as a good story, that either people like or dislike.
Noibat falls under that type of category. It has been established basically it will evolve, and become a fairly strong Pokemon. But it doesn't grow, it doesn't develop, and this power of evolution falls into its lap.
Any other story that's not Pokemon and you handed this assignment into your English Teacher or Creative Writing class, you would fail the assignment for the reasons I mentioned.
Being Pokemon and being for children doesn't make it any better, since there are plenty of examples of Pokemon getting focus, developing getting stronger, and their power DOESN'T just fall into their lap. So unfortunately you can cop out and say its just a children's show as a excuse for not properly developing a character.