well its simple just have pokerus and power items which can be found in the Pokemon item modifier just fight and your stats increase more than usual. the standard will be 10-61stats gained to one thing but if you don't do it right this will be useless hope i helped
Well, I'm not sure why you're Special Attack training a Leafeon, they're a much better physical attacker, but suit yourself I would suggest putting a GBA Pokemon game in to the GBA slot in your DS and then going to the abandoned Chateu and going in to the room that has the eye paintin on the wall, in there you should find Gengars and Haunters, both of which are good for special attack EV training
ev training is culmulative, it gathers the points over time which determine how much of a stat boost u get everytime u lvl up. each stat can receive a max of 255 ev points, and a total of 510 ev points for all stats combined. when u reach lvl 100 the most any stat can be raised is by 64 stat points total with a maxed out 255 of ev points on that stat. Pokemon can gain over 64 stat points depending on their base stats and IVs. For instance, my mewtwo(Modest) gained 88 special attack and umbreon(Quiet) gained 66 special defense.
Garatina,Dialga,Garchomp,Dragonite,Salamance,and last but not least Palkia. Make sure you raise dialga and palkia's stats during battle-Andres Viveros
Lvl20
If you mean PokeRus, it is short for, "Pokemon Virus". However, it is not bad (It's only negative affect is lowering your Pokemon's friendship) , on fact it is very good for training your Pokemon. It doubles the amount of EV's (effort values) that a Pokemon receives when they defeat another Pokemon. When the Pokemon's immune system has fought off the disease, the good effects stay, and the bad effects leave.
No
I do not believe there is, but i MIGHT be wrong. Sorry :(
no i wish though
There isn't one
No, and no. All that is required is that the Pokemon faints.
An Ev in Pokemon diamond is known as an Effort Value. I'm not going into detail because I myself don't know how to do it, but there is a website Called Serebii.net that is the best for you to learn about it. If you happen to master it though, please tell me how to do it. P.S. The Ev training is under Game Mechanics and Effort Values.
The same way you did in all the Pokemon games.
depends on the nature the Pokemon haves:P:P
probly at the pokemon leuge
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Well, the level doesn't really matter, as long as it's not 100. In the end, all the EVs will add up the same.
the power items are power anklet, power lens, power bracer, power weight, power band and power belt, they help speed up the process of ev training and can be obtained at the battle tower for 16BP each