No.
you can't
it's random
man in violet city Pokemon center
yeah no change with that
Basicaly the Pokemon change in there, but I don't know how to change the Pokemon.
No.
no!
you can't
it's random
man in violet city Pokemon center
yes there is
yeah no change with that
It is not possible to change the in-game region on Pokemon Emerald. Each Pokemon game is coded to be set in only one region. This means only data for the Hoenn region exists in Pokemon Emerald. Pokemon Gold, Silver, Crystal, HeartGold and SoulSilver are the exceptions as they are set in Johto and Kanto.
its not an emerald its RAYQUAZA the main legendary Pokemon in Pokemon emerald.
You can't change the way you look to others in Pokemon Diamond. The avatar that is chosen how you look to others is completely by random, and there is no way to change it.
Nearly every Pokemon in Pokemon Emerald have a chance of being female or male. If you have captured a female Pokemon, it won't change into a male Pokemon. It is impossible (without any cheats) to make all wild Pokemon male.