So i had a trial account and it had my lvl 20 priest which was pretty awsome condidering it had like about 2000 hp which is really good 4 a lvl 20 andit had like the best gear! but my friends's brother gave me his account with had 2 lvl 85 so i paid for that one but i really want my lvl 20 priest too!!! is there ANY POSSIBLE WAY that i could some how transfer my character to te one with 2 lvl 85's thanks!!!!

no the account with the trial would have to be upgraded to a full version. blizzard has made it abundently clear that the moving of charecters from one account to another is prohibited unles both accounts are under the same email adress. and blizzard also frowns upon people giving away or selling accounts.

so in short you could change the email adress and then put both accounts under the same battle.net account. but if blizz finds out it was your brothers account they may decide to ban both accounts. plus in all fairness level 20 is super easy to get nowdays. so i say just use your brothers acount and start a new priest. 10 hours should be easy enough to get to 20.