SerTapTap
Member
All the GBA/DS games are metroidvanias, and all but the first one (Circle of the Moon) were directed by Koji Igarashi, the SOTN guy.
Castlevania Chronicles is an enhanced port of a Sharp X68000 game from 1994 and is definitely in the traditional CV mold, so I wouldn't really use it as a point of reference for the metroidvania stuff.
EDIT: if you only get one GBA game, make it Aria of Sorrow.
I guess I am twice wrong on exactly what Circle of the Moon is then. I think I'll just start with Aria of Sorrow or maybe wait for the DS ones when DS VC happens (Right? Nintendo? Please?)