Things You'll Need
Instructions
Know where to look. When trying to catch a shiny Pokemon in fire red, you need to look for them in the area where they're most common. Determine where they can be found by checking your Pokedex (if you've already seen one), or using a guide that lists all of the Pokemon fire red locations.
Go to the area where the Pokemon reside. Be sure to bring a lot of Pokeballs, Great Balls or Ultra Balls, in case you encounter a shiny Pokemon. You don't want to find a shiny Pokemon in fire red and realize that you're not equipped to catch it.
Go to battle. Walk in the tall grass in the proper area and battle as many wild Pokemon as possible. Search carefully for a shiny Pokemon in fire red as you move forward.
Continue battling Pokemon until you encounter a shiny one. Walk or fly to the nearest Pokemon Center to heal yourself whenever necessary. Take breaks when you're tired. There's no predicting how long it will take for you to find a shiny Pokemon in fire red. Patience is key.