Game Freak’s chronic compulsion to make the third version Legendary a Dragon-type Pokémon.
Sorry to quote you so late but I forgot to adress this as an annoyance as well and for some reason I struggle lately to keep up with the forum. Here comes another wall of text of ovethinked stuff from yours truly:
This is seriously quite annoying even as a diehard Dragon type fan. I know big scary dragons are like, the default to go on a monster collecting game. But GF just seems like it can't let go of Rayquaza. Back then, the very concept of a third legendary was crazy, specially with Dragon type. I was too young to experience it but I assume it got the same reaction from when my primary school friends found out about Platinum and Giratina.
Giratina itself it's fine. They are a Dragon trio. Literal gods that control space and time, and Satan controlling antimatter. And Dragon was still a very big deal.
Kyurem...you could argue it's starting to get less special, but they were once literally a singly entity and they made it a dragon, it had to be done.
Zygarde starts to be a problem. You finally let go of dragon trios, but you still can't help yourself here. Okay, Nidhoggr is usually a serpent who could have been other types like Poison, but it's hard to argue Dragon Ground makes sense for it (and as I just said, I actually like it apparently can't do shit towards Xerneas and Yveltal). Still, is the same gen that tried hard to counter Dragon, yet they kept giving the type to powerful mons. Still, they could have gone fully in the cell aspect, is not luke it makes sense for our freaking Fenrir to be Dtagon...
Necrozma is fine! See it's an Ultrabeast, it looking as a dragon head if you rearrange it doesn't mean it follows the same order of our world- oh wait nevermind, he just needed light and to absorb other Psychic types to turn Dragon. Ultra Necrozma doesn't even look that much as a dragon if you ask me...
Eternatus is hard to judge. It's clearly not your standard third legendary, but depending on how you see it that's even worse: there was no way to fit a third Dragon with the wolf duo, so it's instead their mortal enemy. Again, it's also alien enough it could have been typed something else (kudos to giving us a Poison legendary tho)
SV don't have a third legendary, which...maybe it's a good sign? Sure the Raidons are dragons, but they restrained themselves enough ro not have a third member. But there is also absolutely no doubt in my mind that, if Terapagos didn't have its typing gimmick, they would have given it Dtagon somehow. I totally expect grn 10 to have a third dragon.
People often talk about "archetypes" in new gens, but I think this one gets kind of glossed over. Sure it isn't a Pikaclone, a regional mammal/bird/whatever, but that's even worse imho because they are supposed to be very special legendaries. Prior to DLC, you could even argue they are more important than the two box art coverts: it works as a teaser of the next version and as a secret encounter of sorts. And it's usually the most powerful of the trio. It means business. So we is it
always a Dragon? Not even being from another dimension or planet stopped them.
Of course I don't think it limits their creativity, it's probably the opposite:" how are we going to get the dragon this time?" In my experience, creativity is at its best with a known limitator. But it has just gotten boring. It isn't exciting to me to guess the type of the new legendaries (which nowadays they still try to do in the TCG, even through the only time it made sense was the first one, with Solgaleo and Lunala no being revealed as evolutions) if I know the third one is Dragon-something