Well, of the first 251 there were only four dragons... and one way a baby. And one was a freakin' SEAHORSE. And one was the pre-evolved form of the other.
In FRLG, in the final fight against the rival, AKA Champion, he would change around his Pokemon eventually to have them all at Lv. 70 and include a Tyranitar, Dragonite or Metagross depending on which starter you picked. He'd change his party after about 20 defeats.
Well I just completed the most badass GTS trade cycle EVER.
I caught a Skuntank and put it up for a Purugly. Then I put up the Purugly and traded it for a Rampardos. Now I put up the Rampardos to trade for a Bastiondon!
...I feel bad getting rid of the Rampardos, though, because it had such a cool moveset and it looked like it was really close to the guy who trained it before.
They probably hacked a whole Pokedex or something.
I just played Ruby for the first time in ages (I haven't transfered pkmn to D/P) and was very surprised to find Latios in my box. I don't remember ever catching him. I also have a random Zapdos. I don't know why.