Anime mecha series ......i think...-_- '?

I am looking for this mecha anime and cant remember the name ......its about a young boy and he is away from home to train to pilot a mecha of some sort (they are not as mive as gundams i don't think)and he and fellow students each separately get in this body fluid capsule thing that a computer checks to see if you have any sores or scratches and this particular boy has NONE and thats really all i can think of the show ......I used to watch it sometime in either 8th or 9th grade after school on cartoon network so it may have been in the time period of 98'-00' if someone could help that would be simply amazing thanks in advance.