Here's why:
* Event Pokémon are unique and often have special moves or abilities. They can be very valuable, and the GTS isn't designed for trading these types of Pokémon.
* Ribbons are often given to Pokémon for winning competitions. This adds another layer of value to the Pokémon.
* The GTS is designed for general trading. It's not specifically meant for trading valuable or special Pokémon.
If you want to trade an Event Pokémon with a Ribbon, you'll need to find a reliable trading partner through other means, like:
* Trading forums and online communities.
* Discord servers dedicated to Pokémon trading.
* Local events or tournaments.
Remember to be cautious when trading valuable Pokémon. Always research the person you're trading with and make sure you understand the terms of the trade.