ROM Hack Question about Pokesav

[TodayiSawMyHeroF]

When i make the stats 999 in pokesav and i lvl up the stats go back to its regular amount, but if i were to put in a legitimate attack and i level it up will the stats rise from there or go back down?

-thanks

Edit: i just tried it and i set my speed to 3 higher then what it was before. It was 25 and i changed it to 28. When i leveled up i gained +-2 speed. is there anyway to make the stats just increase from 28?