We are currently experiencing a flood of requests from bots scraping the forums. Unfortunately it has gotten to the point where it is negatively impacting the site. As a result the forums may be slow and you may periodically experiance an error message.
We are aware of the problem and apologize for the inconvenience.
It depends what you are using it for.
If you want a good strong fighter use Attack. It has enough speed to outrun most Pokemon and it's amazingly high atk/sp.atk give it a huge edge.
Attack form is the best. Its huge attack stats can easily ko most pokemon in 1 hit, not to mention only the likes of ninjask and deoxys speed form can outspeed it.
What I would do is do speical training. Trade it to Firered to ev train it in attack. Then trade it in Leafgreen and do some defense on it. Then in Emerald make it speedy. Then it has equal stats. Trade it around at times where it learns good moves
Attack form is the best. Its huge attack stats can easily ko most pokemon in 1 hit, not to mention only the likes of ninjask and deoxys speed form can outspeed it.
Extremespeed, Quick Attack, Mach Punch, all those can outspeedify Attack. And think about agility and BPing and stuff.
It's all about preferences. Some people want a tank, some people want a sweeper, and then there's Emerald. In answer to the question, I prefer the Speed form, since it's balanced.
i personally like the speed form for stats and pwers, but the normal form for its looks, but there should be an ultimate from, with all extremly high stats