EV training not working how it should. Can anyone help me?

So I caught a wild Gastly with a timid nature to try and raise it to the the fastest Gengar possible, with 350 speed. I trained it with only speed and sp atk EVs, and eventually realized his stats weren't going to be what they should be. So then I bread a Gastly with timid nature in hopes of fixing the problem. Now once again his stats aren't matching up. Is there anything I might be doing wrong? Please help.

Your ghastlycould have low "IV's" which means how high a Pokemon's stats can go when training. Even if he has a timid nature, it's true that his speed stat will go up higher than most other stats, but if your ghastly has low IV's, then its speed will go up less than a ghastly with high IV's, even though its speed goes up more than other stats. IV's are usually random for Pokemon. I hope that made sense :P

www.serebii.net/games/iv-calcdp.shtml

This is a pretty good iv calculator but the directions can be tedious

I understand what IVs are, do you know if there is any way I could select for the best possible IVs? In other words, is there a way I can determine it's IVs? I understand that there are the little characteristics like "likes to run" or "alert to sounds", but is there a way I can make sure he has the highest possible speed IVs?Atomic_Bacon

hey guess what i checked my pc box and i had a pokemon with the pokerus. i gave it to all my pokemon but i don't know how to ev train lol so idk what to do about it.

[QUOTE="Atomic_Bacon"]I understand what IVs are, do you know if there is any way I could select for the best possible IVs? In other words, is there a way I can determine it's IVs? I understand that there are the little characteristics like "likes to run" or "alert to sounds", but is there a way I can make sure he has the highest possible speed IVs?MisterG333