Here's why:
* Shiny Pokemon are rare variants with different colors. They are predetermined at the moment they are generated in the game.
* There is no way to change a Pokemon's shininess after you catch it. You cannot force a Pokemon to become shiny through any in-game methods.
How to find a Shiny Pidgeot:
* Masuda Method: This method involves breeding two Pokemon from different regions. This increases the chance of encountering a Shiny Pokemon.
* Chain Fishing: Catching the same type of Pokemon repeatedly in a row increases the chances of encountering a Shiny. This works best for certain Pokemon that are only available through fishing.
* Shiny Charm: This item significantly increases the chance of finding a Shiny Pokemon. You can obtain it by completing the National Pokedex in Pokemon Diamond.
* Random Encounters: While the chances are low, you can always encounter a Shiny Pokemon randomly in the wild.
Remember: Shiny Pokemon are very rare, and it takes patience and luck to find one.