once you finsh the sappfire game you can go lab and get the johto Pokemon to start the johto league now and train them to beat the johto league
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.
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.
Pokemon Sapphire is a GBA game - since a DSi does not have the GBA slot unlike the regular DS or the lite, it cannot play Pokemon Sapphire.
You can't. You'd have to trade it from a Pokemon FireRed or LeafGreen game to get it in Sapphire.
You can't catch Ditto in Pokemon Sapphire, but you can trade it to your game from Pokemon Emerald/FireRed/LeafGreen
I don't think it evolves in Pokemon Sapphire or in any Pokemon game. Sorry to disappoint you if I did.
As far as the game goes, you can't duplicate Pokemon on Sapphire. Tried it and it glitched up.
No you don't need it to finish your Pokemon game
from the Pokemon professor at the beginning of the game
Bea the game
Pokemon Emerald,Ruby and Sapphire
You can't be cause Sapphire is a Generation III game and Regigigas is a Generation IV pokemon.