What happens if you catch every pokemon in ruby?

In Pokémon Ruby, if you manage to catch all 386 Pokémon, you get a special reward: The National Dex. This unlocks a new feature called the National Pokédex which lets you:

* Track every Pokémon: It includes all Pokémon from previous generations, expanding your Pokédex beyond the Hoenn region's native Pokémon.

* Find new Pokémon: It allows you to encounter Pokémon from other regions, even if you're still in the Hoenn region.

* Trade with more players: You'll be able to trade with other players who have also unlocked the National Dex, expanding your trading options.

However, it's not possible to actually catch all 386 Pokémon in Pokémon Ruby.

Here's why:

* No National Dex in Ruby: The National Dex feature was introduced in later games like Pokémon FireRed and LeafGreen.

* Missing Pokémon: Some Pokémon, like the legendary Pokémon from previous generations, are not found in the Hoenn region and can't be caught in Pokémon Ruby.

* Event-Exclusive Pokémon: There are some Pokémon that were only available through special events, making them impossible to catch in the standard game.

In conclusion, while you can't catch all 386 Pokémon in Ruby, it's still a rewarding journey to catch as many as possible. It unlocks a larger pool of Pokémon to trade and encounter, and makes the game much more interesting.