No, they are completely to different items, although if your playing like 200 rounds its theoretically a masterball with high percent catch rate.
There is not any dawn stone in Pokemon emerald, only in Diamond and Pearl. And the Pokemon that evolve from this stone don't appear in emerald/ruby/sapphire, they become available in Diamond and Pearl.
the closest you can be to a gym leader in this game is setting up a secret base with your best Pokemon then mixing records
beat the elite four and fly to lilycove city and go to the Pokemon fan club and you become a fan of the three children.
I think it makes the Pokemon that hold it become happy more easily but im not sure I also heard that it is useful to chansey as it can help chansey evolve to blissey. That's not all, the most cool is that if your Pokemon have it equipped, it gains hp when it hit opponent.
You need to get a Pineco to evolve into it at level 31. You can get a Pineco after reciving the National Pokedex at the end of the game and inserting an Emerald cartridge into your DS. They will become available at Routes 203, 204, 210, 229 and Eterna Forest.
Go to the Pokemon league and become the champion
There is no key it opens when you become a Pokemon champion.
There is not any dawn stone in Pokemon emerald, only in Diamond and Pearl. And the Pokemon that evolve from this stone don't appear in emerald/ruby/sapphire, they become available in Diamond and Pearl.
You cannot be a gym leader in ANY game.
The fastest Pokemon you can get is ninjask catch a nincada train it to level 20 and it will become ninjask.
You must have a Pokemon firered or leafgreen trade you a pidgey then train it to level 36 and it will become a pigeot.
After you beat the game, it will become a roaming pokemon. It will run after the first turn, I suggest using the masterball or using a strong wobbufett. -CrystalManiac
certain pokeblocks can make Pokemon happier if your talking about Pokemon emerald or Sapphire, but generally the more you raise your Pokemon the happier they become.
the closest you can be to a gym leader in this game is setting up a secret base with your best Pokemon then mixing records
ditto can only be caught in emerald after u have become the champion behind the fossil maniacs house ditto can be caought BUT ONLY ON EMERALD
Get feebas's beauty up to the max level train it one level and it will become Milotic.
beat the elite 4, become champ.