Instructions
Fight Pokemon with high speed stats. Find an area where you encounter a large number of fast Pokemon. You can tell that a Pokemon is fast when it has the first attack in a battle -- unless your Pokemon is particularly slow. The best way to tell how fast a Pokemon is is to catch it and look at its statistics. Examples of fast Pokemon are Pidgey, Ponyta, Blitzle and Cinccino. Run from any Pokemon that do not fit the description to avoid wasting your EV points.
Battle Pokemon with high attack stats. Legendary Pokemon typically have the highest attack stats, which can make focusing on attack training difficult. There are plenty of other strong Pokemon you can battle to improve your attack stat. Examples of high-attack Pokemon are Dragonite, Machamp, Haxorus and Darmanitan.
Give your Pokemon items to hold. In the fourth- and fifth-generation "Pokemon" games, certain items will give them extra points toward a stat. In fourth-generation games, the Power Bracer increases the attack stat of your Pokemon, while the Power Anklet improves speed. In fifth-generation games, the Muscle Wing improves attack and the Swift Wing improves speed.
Feed your Pokemon vitamins. Protein improves Pokemon's attack stat, and Carbos improves their speed stat. You can feed each Pokemon in your party a maximum of 10 of each vitamin. Your Pokemon will gain five stat points in an area for every two vitamins you feed them.