you cant cant
day care
Train them............
raise it to level 59
You get a Pokemon with the ability "Magma Armor"
raise it to level 58 or 59
Raise it to level 25 or higher.
Finish the pokedex and raise all ur Pokemon too the end..i guess. Also don't forget to visit white forest.
Litwick
You don't need them for the storyline, you get them so your pokemon can hold them and raise their stats.
you have to raise zweilous to level 64
well the black ones run faster.. so i guessing the white..
The best way to raise your Pokemon in Pokemon Sapphire is to have all 8 Hoenn badges and trade them for Pokemon Ruby version. Doing is will make the Pokemon Ruby Pokemon evolve faster. It works like this because traded Pokemon will gain a boosted amount of experience so they will grow much faster. Example you trade a Rayquaza (Pokemon Sapphire) for a Rayquaza (Pokemon Ruby) at LV 70 once Rayquaza you received from Pokemon Ruby will gain boosted EXP points every time. And the same goes to the Rayquaza that was transfered into Pokemon Ruby. Traded Pokemon grow much faster in trades than normal.