Here's why:
* Shiny Pokémon are determined by a random number generator (RNG). You can't control this RNG with a code.
* Replay codes are for specific events or gameplay modifications. They don't directly affect the odds of encountering shiny Pokémon.
* Shiny Pokémon have a 1/4096 chance of appearing. This is extremely rare and can't be "maximized" with a code.
How to increase your chances of finding shiny Pokémon:
* Chain fishing or battling: This involves continuously catching the same Pokémon or battling the same trainer. The more encounters you have, the slightly higher the odds of finding a shiny.
* Shiny Charm: Obtain the Shiny Charm, which increases your chances of finding shiny Pokémon from 1/4096 to 1/1365.33.
* Masuda Method: This method involves breeding Pokémon from two different regions. It significantly increases the odds of finding a shiny, but it requires a bit more effort.
Remember, finding shiny Pokémon is primarily based on luck, but you can increase your chances with these strategies.