Are Dragon Pokemon in Pokemon sapphire version on Game Boy Advance SP?

Yes! you will need waterfall after beating Wallace the eighth gym leader use it in meteor falls to find bagon (dragon type) (highly recommended!!!) and there is also trapinch (ground type) (find in desert ruins) which evolves into virbrava at level 35 (dragon-ground type) and at level 45 it will evolve into flygon (dragon-ground type) (highly recommended!!!)

last but not least you can catch swablu on route 114 south of fallabor town, but he is only! flying type, you have to evolve him into alteria which is dragon-flying type at level 35

and later on in the game after you have beaten the elite 4 only (in ruby and sapphire)

you can catch rayquaza :)