the idea is fairly simple get rid of the old text for kids in the trainer school and replace it with actual knowledge about some "advanced stuff" much more usefull for them in the long run   1. have one of the npc talk about the difference between phisical and special attack 2. maybe one for the deffense  and special deffense has well 3. one that talk about basic ev training 4. maybe one telling you about the ev reducing berries (could be the same has the last one)