In the manga, he is called red. That is all.
What do you think? I mean could you imagine the destruction that giant Dragonite could cause? The thing collapsed a cliff with the swipe of it's damn tail...
That reminds me of nurse Joy's gaint magikarp friend from the orange island series. It was huge, but when it evolved it became a normal sized Gyarados,
Yea i remember one episode after shipwreck in Kanto. There was giant fully evolved starters, Pikachu and other gigantic Pokemon.