I believe that in planning for DP, Rotom was meant to be a legendary, and Shaymin was not.
For one crucial reason : Rotom has the legendary battle music and Shaymin does not.
I guess they forgot to switch the tracks before release or something.
Rotom is not legendary at all, not even semi. It's just rare.
Lapras and Eevee are only found once too yes? Breeding does not count, just encounters.
Lapras ; RBY
Eevee ; RBY/GSC/FRLG
^ Just for reference. They are both most definitely not legendary at all. XD;
There are other "one" Pokemon but it would take a bit of looking to list them, and I believe I got the point across already.
As for the topic itself.. I love the Sinnoh legendaries. :3
I like where they went with them and how they created physical forms of time, space and anti-matter. As well as willpower, emotion and knowledge. To me, it makes them actual legendaries. They have something to be
truly legendary for.
The only problem I have with the Sinnoh legendaries is that there is
way too many.
My least favorite of them have to be Heatran and Phione. Phione is cute and all but besides being a child of Manaphy, how is it legendary as a
being? It's not powerful, has a mediocre movepool and has no legend behind it. The latter goes to Heatran too. Heatran may be powerful but what is so special about him? He has no legend to fit his "legendary" status. He may as well be a pseudo-legendary for his power then. It's a guardian Pokemon, so what? If that makes a Pokemon legendary make Lucario legendary too. Sheesh. ]:
I think I've covered everything.. so yeah. XD