Can you get more than one EXP. Share in PKMN Emerald?

Question

I'm trying to level my team up equally but I only have one EXP. Share. Is there any possible way to get more than one EXP. Share?

Answer 1

You can randomly get an exp. share if the last 3 digits of any of your Pokemon's OT IDs match the lottery number in the Lilycove Department Store. You might also be to change the number multiple times per day by soft resetting.
source
You can also trade an exp. share from another copy of a gen 3 game.

Comments

Istg I looked directly at the lilycove department store page to see if that was a thing in gen 3 and flat out missed the exp share there

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Also wouldn't it be easier to just trade pokemon holding the exp share instead of different lotto numbers?

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Yes I'm stupid.

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Sadly, I don't know how to trade from another Gen 3 copy.

Answer 2

Aside from the answer mentioned, there's also the Pokemon/Item Cloning Glitch in Pokemon Emerald. I don't about the legality of this glitch, but I can vouch for the fact that it works. However, you need to have beaten the Elite 4 and Champion at least once and gain access to the Battle Frontier.

1. In the Battle Frontier, go to the Battle Tower
2. Deposit your Pokemon (holding the Exp. Share) into the PC in the right
3. Save your game after logging off from the PC.
4. Withdraw your Pokemon (holding the Exp. Share) after saving
5. Talk to the lady nearest to the PC and enter either of the levels
6. Once you've chosen your 2 Pokemon (any) following which there will be two pauses. After the second pause, when the lady asks again if you want to save, you can soft reset the game
7. When you restart the game, the Pokemon (and Exp Share) will be cloned; there will be one copy in your Party, and the other in the PC where you deposited it before it saving the first time.

Congrats, you now have two Exp. Shares.
If you're still confused, this video is a straightforward guide.

P.S. Your mileage may vary. If you have an authentic cartridge for Emerald that you do not want to compromise, or feel it is unethical to use glitches, then the choice is entirely yours. The option's there, and I figured I'd let you know.