Here's why:
* Alakazam evolves from Kadabra: Alakazam doesn't appear in the wild. You need to evolve a Kadabra using a Trade Evolution. This means you need to trade a Kadabra to another player or use a Pokémon Trading System like the GTS.
* Kadabra is not found in Diamond: Kadabra is not available in the wild in Pokémon Diamond. You can only obtain it through trading.
How to get Alakazam in Diamond:
1. Find someone to trade with: Find a friend, family member, or someone online willing to trade a Kadabra.
2. Trade your Pokémon: Trade a Pokémon you have in Diamond for their Kadabra.
3. Level up Kadabra: Once you have Kadabra, level it up to level 40.
4. Trade again: You'll need to trade Kadabra again, this time to a different person, to evolve it into Alakazam.
Good luck finding a trading partner and adding Alakazam to your team!