No but it is essential to trading with other games.
...? umm this question doesnt make sense. you do it by seeing Pokemon! all the Pokemon in the game! (no trade)
You finish the game by beating the Elite Four. If you beat that try to get all the Pokemon from firered, leafgreen, emerald, sapphire, ruby, and pearl.
Many people think that after you beat the Pokemon league and your rival, you completed the game. To finish the game totally, get every Pokemon in the kanto and national pokedex and beat the Pokemon league. It's a real challenge!
start with bulbasaur an finish the game (includeing n dex) and done
yes you can trade pokemon leafgreen pokemon to pokemon emerald version same as pokemon fire.
The Ending.
you cant because leafgreen is an older game then Pokemon pearl plus its a gameboy advance game.
Manaphy is a legendary water type of Pokemon. It is not possible to get this Pokemon in the game Pokemon LeafGreen.
Trade, Train, Evolve, Catch, Breed all the pokemon!
Not in Pokemon leafgreen only in Pokemon Firered never ever in Pokemon leafgreen And in Pokemon firered it is rare in power plant not available in Pokemon leafgreen?
You cannot 'finish' Pokemon LeafGreen and FireRed. You might be thinking about defeating the Elite Four. That is the end point of most trainers, but you can go ahead and capture legendary Pokemon like Mewtwo, Lugia and so-on.
Yes, however, you must finish the entire game, and also get the ruby and sapphire on the sevii islands. Then you can trade with people with R/S/E.