Pokémon Ruby and Sapphire/Skill and Level Increasing Items

There are a few items that help your pokémon grow in different ways.

Macho Brace The Macho Brace doubles the amount of Effort Values gained (EV's), while lowering speed in battle (only temporarily). Effort values control your Pokemon's stats, 4 EV's equals 1 stat point. Obtainable at the Winstrate House on Route 111.

Lucky Egg The lucky egg is an item that increases the amount of Experience points your pokemon gets by 1.5. To obtain the lucky egg, you have to catch a wild Chansey that is holding one in the Safari Zone, in Fire Red or Leaf Green.

Soothe Bell The Soothe Bell increases happiness gain from your pokemon when worn. This is useful when trying to evolve pokemon the evolve from happiness (like Espeon and Umbreon) or if you just want your pokemon to love you. Obtainable at Slateport in the Pokemon Fan Club.