That is impossible to say for each Pokemon has a different nature. Dragon types are recommended, they only have one weakness. If you want the ultimate Pokemon, take a dratini with a nature that will help it;s stats, lvl it up and give it all the items you can buy. ( Carbos, Zinc, etc )
MAYBE DRAGONITE, TYRANITAR, OR MEWTWO
Xd001 is a code name for super strong shadow Pokemon in Pokemon xd gale of darkness the most powerful being Lugia you would have to purify it and beat the game then trade it to leafgreen.
No you can not find TM. thunderbolt in the power plant. Sorry. But you can the second most powerful electric attack there, Thunder, along with the Legendary Pokemon Zapdos.
Mewtwo, Articuno, Zapdos, Moltres. There at cerulean cave, mt ember, seafoam islands and the power plant.
Arceus
The best water type would be Kyogre but you can't get it in leafgreen you need to get one from sapphire or emerald other than that the best water Pokemon is blastoise.
Xd001 is a code name for super strong shadow Pokemon in Pokemon xd gale of darkness the most powerful being Lugia you would have to purify it and beat the game then trade it to leafgreen.
No you can not find TM. thunderbolt in the power plant. Sorry. But you can the second most powerful electric attack there, Thunder, along with the Legendary Pokemon Zapdos.
Yes you can trade leafgreen version Pokemon to another leafgreen version.
Mewtwo, Articuno, Zapdos, Moltres. There at cerulean cave, mt ember, seafoam islands and the power plant.
Chansey (sometimes wrongly spelled as Chanesy) is a powerful Pokémon in LeafGreen version. You can find one in the Safari zone.
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?
Most dark types or normal types.
In Pokemon FireRed and LeafGreen, Rhyhorn learns its two most powerful moves at level 52 (Earthquake) and 57 (Megahorn). It evolves into Rhydon starting at level 42.
Arceus
you should go to gamestop
HelloSorry to say but you cant trade Pokemon from pearl to leafgreen but you can migrate Pokemon from leafgreen to pearl via the pal park
On Pokemon Pearl's title screen, if the Pokemon LeafGreen game is in the GBA slot, click on "Transfer From LeafGreen" and you can choose six Pokemon from LeafGreen to transfer to Pearl, but be careful-you can't trade them back.