At the end of the 1992 Disney adaptation of Aladdin, Aladdin uses his last wish to set the genie free instead of wishing to be a prince (which is odd in itselfwhich is odd in itself).
One thing I have always wondered is, why is there at most one wish remaining? Sure, Aladdin only has one wish, but none of the other characters have used any!
Why couldn't Aladdin, say, give the lamp to Jasmine, let her make a few wishes ("Oooo you're a prince again, we're married already, and **** it I want a blimp"), then have Jasmine give it to the Sultan ("History will remember me fondly, let's abolish crackers, and give me 1091 stackable animal toys") and then maybe let Abu have a wing at it ("gold, gold, and gold").
And, at the end of the day, Aladdin can still use his last third wish to keep his promise!