Aladdin is the main protagonist of the musical of the same name. He starts out as a street rat working as a street performer with his friends Babkak, Omar, and Kassim. He is sought by Jafar to retrieve a magic lamp from the Cave of Wonders. Upon finding it, he unleashes a Genie who offers him three wishes and he decides to use two of them to win the hand of Princess Jasmine and the third to set the Genie free. When Jafar discovers his secret, he steals the lamp and uses his wishes to become powerful, but Aladdin defeats him, saves Jasmine and Agrabah from Jafar's wrath and sets Genie free, thus proving his worth and winning Jasmine's hand.
Like all Disney musical adaptations, there are a few key differences in terms of Aladdin's role in the story, in contrast to the original animated version. For instance, here, instead of having Abu, Aladdin has three human best friends by the names of Babkak, Omar, and Kassim, who, like Aladdin, are thieves making constant attempts to turn their lives around by becoming street performers.
A few added musical numbers also appear; such as the moderately famous "Proud of Your Boy". Though Aladdin's mother is still deceased in this version, the song is still prominently featured, being sung by the street rat. Other songs include "A Million Miles Away" (a duet with Jasmine), "Diamond in the Rough" with Jafar and Iago, and more.
Aside from these differences, though, Aladdin's role stays truthful to the source material, for the most part.