Your avatar is fine. If you don't like it, you can change it. I wasn't really crazy about my avatar, either.
U can get the Mystery Gift and get the directions to use it to get to the island with Deoxys on it. The second quesztion I have no clue PokeBoy or Ho-oh2224 can answer the 2nd and 3rd question.
Q2, u have 2 use action replay. otherwise it has NEVER been found out. i used actoin replay 2 get by mine.
Q3: No, i have never played, seen dragonballZ, so no, i cant go.