3rd Gen need some advice

what do you think are the best evs to train for a scizor??

second question, isnt the max for one stat. 255, my scizor has 304????

max the EV's for attack & speed.

well its attack is 304 and its at lvl 81 buti havent started speed, this is really my first try at ev training, i'm just seeing if it works

It works, but I get the feeling you don't fully understand how EV's work yet. I would visit GameFAQS and check an EV FAQ in the Emerald board to get a good idea on what they are.

You can get 255 EV points total. That's 63 extra points for one stat.

If you EV train it in speed.. well, if you beat FOUR Pokemon that give out ONE speed EV point, you'll get one more point than you usually would when the pokemon levels up. you might get more, just depends on how fast it levels up.

It doesn't mean it can't get 304 in whatever stat it is.. it just means in the end, it'll have 63 more points than it would if you didn't EV train it.

305 at lv81 you are very good at EV trainig. now stat EVing speed. its attack is going to be 340+ at lv 100.