Here's how Hidden Power works and how to get it in Pokemon Ruby:
1. Hidden Power Type: Hidden Power's type is determined by the Pokemon's IVs. Each IV stat (HP, Attack, Defense, Special Attack, Special Defense, Speed) contributes to the type.
2. IVs and Hidden Power: While you can't see the IVs of your Pokemon in Pokemon Ruby, you can influence them by breeding. When two Pokemon breed, their offspring inherit a combination of their parents' IVs.
3. Breeding for Hidden Power:
* Nature: Each Pokemon has a "Nature" that boosts one stat and lowers another. You can use breeding to get a Pokemon with the desired nature to influence its IVs.
* Effort Values (EVs): By training a Pokemon in specific ways, you can increase its EVs. EVs are separate from IVs, but they affect a Pokemon's stats in battle, so you can use them to determine which IVs you want to prioritize during breeding.
4. Hidden Power in Later Games: In later Pokemon games, you can use the "Destiny Knot" held item to help breed Pokemon with better IVs, and the "Pokerus" virus helps increase EVs faster.
Unfortunately, in Pokemon Ruby, you can't directly control IVs or breed for Hidden Power. You can only hope for a Pokemon with a favorable Hidden Power type through random chance when catching or breeding.
If you are looking for a specific Hidden Power type, you may have to consider trading with other players or playing a later Pokemon game with more tools for breeding and IV management.