well, that's not the problem. As Ahlony saying, you just train them, give them greens and train them again.
The problem is how to find the fast trainers (so not to spend useless greens to power train them)
so read this
summary #172
http://forum.topeleven.com/tutorials...-chris-18.html
and the other problem of course is to have greens and money too, because they 're very expensive.