if I use a reset bag on a lvl 100 Pokemon. how does it stats going up again? normal is it by lvl up right? but by a lvl 100 Pokemon can't you any lvl up. how do you get the ev's trained to your Pokemon?
how does it stats going up again?
If you use a reset bag on a level 100 Pokemon, its stats will go down, yes. As for how they go up, they will go up when you EV train them. You can find more about EV training at this handy site: http://pokemondb.net/ev