Is there anything worth doing after you catch the legendary trio in pokemon fire red?

Question

Is there anything worth doing after you catch the legendary trio in pokemon fire red?

Answer 1

yes you can try to comlete your national dex by catching every pokemon.

Answer 2

You have to get the Ruby and Sapphire stone to Celio in One Island at the pokemon center.

Answer 3

You can try catching the legendary dogs. And try to beat the E4. Also go and catch Mewtwo