What Pokemon has the ability pickup on ruby?

You can't find any Pokémon with the Pickup ability in Pokémon Ruby. Pickup was introduced in Generation IV (Diamond and Pearl).

Here's why:

* Pickup was a new ability: It wasn't around when Ruby was released.

* Abilities were a new mechanic: The concept of Pokémon having abilities was introduced in Generation III (Ruby, Sapphire, and Emerald).

If you're looking to find a Pokémon with Pickup in Generation III, you'll need to wait until Generation IV (Diamond, Pearl, and Platinum).