hey i was wondering is there a way of reviving aeons in battle?

no

Unless you are using the Magus Sisters. Cindy can cast Life or Full-Life if either Sandy or Mindy are dead.

But er, in general, no you can't.

i didnt think you could but i just thought id ask any way

yeah why not

theres one thing i dont understand than. why can the aeons learn abilitys like life if u cant really use it.

You could have your Aeon use Zombie Attack and then use Full-Life on the fiend

nope

You could have your Aeon cast Zombie and then use Full-Life

hey thats a good idea:)

DeMoN-mAn is wrong, I use this this strategy when fighting fiends with high HP but, it does not always work because some are immune to Zombie.

Er right. It's a good idea for fiends who are not immune to Zombie then.