Is there a legendary Pokemon in MTCoronet that starts with x diamond?

There is no legendary Pokemon in Mt. Coronet that starts with "x diamond".

Here's why:

* Mt. Coronet's Legendary Pokemon: The only legendary Pokemon found in Mt. Coronet in Pokemon Diamond and Pearl are Dialga and Palkia.

* Diamond and Pearl Legendaries: Neither of these Pokemon have names that start with "x diamond".

* "X" and Legendary Pokemon: There's no connection between the letter "X" and legendary Pokemon in the Diamond and Pearl games.

Let me know if you have any other Pokemon questions!