How do you get the exp share?

Exp share can be obtained may ways in ruby and sapphire and emerald, once you talk to steven in granite cave and go through the whole game go to the Devon corp in rustboro city and talk to the president he will give you exp share. But wait theres more in lilycove city theres a dept store inside theres a lady near a PC behind the counter talk to her and she will ask you to take a lotto ticket if the numbers on the ticket match any of your pokemons ID numbers you win either a pp up (third prize) exp share(second prize) max revive (first prize) or a masterball(JACKPOT!). To win like i said you need lots of ID numbers to do that trade with lots of people who have ruby and sapphire and emerald and trade with Pokemon colosseum and Pokemon xd gale of darkness and Pokemon firered and leafgreen you will get lots of ID's the digits must match the digits on the lotto ticket and you will win! If you seriously still can't get it get one from firered or leafgreen or colosseum or xd gale of darkness.