Hidden Power on Pokemon

[DaBlackBandit]

I have a Croconaw with Hidden Power Flying? Where can I EV train in Gold or Silver or Crystal for Attack ev's because I wanted to make this moveset

Curse, HP: Flying, Earthquake, Rest/Roar/Rock Slide/Hydro Pump

I have a Bayleef that is soon to be a Meganium, and it has Hidden Power Grass, is that better then Razor Leaf and Giga Drain?

[frylock]

Hidden Power has an attack between 30 and 70. If you have HP Grass with a Power of 70, it would be more powerful than those attacks, but woudn't have any effects.

[Poryhedron]

Let's see, a good place to build Attack Stat Exp...
How far along are you in the game? If you've beaten it and are just building a competitive team now, Cooltrainer Gaven is a good guy to have in your Pokégear. He fields a Victreebel (ATK 105), a Kingler (ATK 130) and a Flareon (also ATK 130). Cycling Road is also a good place to go, especially in the morning hours when it's light enough for the Fearow to be about, but not yet warm enough for most of the Slugma.
Early in the game, go to Dark Cave or Union Cave and have Croconaw beat up on Geodude (ATK 80). In Gold Version, Union Cave also has Sandshrew (ATK 75); they're good, too. The Zubat and Onix (ATK 45 each) aren't worth your PP, and the Rattata (ATK 56) are little better.