you catch 60 different Pokemon GO to professor oak.catch mew and mewtwo catch one of the three legendary dogs.
charmander...suicune
bulbasour...entei legendary dogs to the left
squirtle...raikou
squirtle...raikou
You have to beat the elite four and defeat team rocket for the last time on four island, get the sapphire, and give it to Celio.
There are Pokémon from Johto in Leaf Green, however you can only find them on the Sevii Islands. (That is after you beat the Elite Four)
Go to Indigo Plateu. You will battle Elite Four there and that is the end of the game. Dont worry, you will still be able to continue with game after you beat them. Train your Pokemon before going to Elite Four because they are strong.
if ur referring to the Pokemon daycare, one is located south of cerulean city, and the other daycare (also a breeding center) is on four island.(u must beat the elite four to get to four island.)
You then have to beat Cynthia
No its not an HM in leafgreen.
train your Pokemon that's it.
Beat the elite four.
beat the elite four and your starter has to be a bulbasaur
You have to beat the Elite Four once.
all you have to do is not get beaten
You have to beat the elite four and complete your pokedex.
The same you can do in Fire Red.Read my answer to that here:What_can_you_do_after_you_beat_the_elite_four_in_pokemon_fire_red
beat the elite four
you catch and train Pokemon fill up the pokedex and beat the elite four
u can beat elite 4 again ., but they has improve their pokemon level . GL !! ^^
Red is the boy playable character in leafgreen you don't defeat him because you are him.