* GTS Rules: The Global Trade System (GTS) in Pokémon Diamond only allows you to trade for Pokémon you've seen in the game. This is to prevent players from getting Pokémon they've never encountered, which could spoil the experience.
* Encountering Numel: You can find Numel in Pokémon Diamond in the following locations:
* Route 212: Numel appears in the tall grass.
* Grand Underground: Numel appears in the Rock and Cave areas.
Here's how to get a Numel:
1. Explore: Go to the locations mentioned above and search for Numel in the tall grass or in the Grand Underground.
2. Catch It: Once you find a Numel, try to catch it using Poké Balls. Be prepared for a potential battle.
3. Trade: Once you have a Numel, you can trade it on the GTS for other Pokémon you might want. You can also try to find a friend who's willing to trade.
Remember: Even if you find a Numel, you might not be able to trade it for another Pokémon if the other player hasn't seen it in their game.