Here's why:
* No in-game system: Pokemon Ruby doesn't have a built-in mail or delivery system. You can't send letters or packages to other trainers.
* Wingull's limited abilities: While Wingull can learn moves like Fly and Peck, it doesn't have any abilities related to delivery or carrying items.
If you're looking for a way to send messages or items in Pokemon Ruby, there are a few options:
* Trade with friends: You can trade Pokemon with other players, and you can include items in the trade. This is the closest way to "deliver" something to another player.
* Use the "Secret Base" feature: You can create a Secret Base and leave items there for other players to find. This is a more informal way to share items with other players.
* Use online resources: You can use websites or forums dedicated to Pokemon Ruby to connect with other players and coordinate item exchanges.
Remember, while you can't use Wingull to deliver mail in Pokemon Ruby, you can still use it as a valuable member of your team!