Kingdom Hearts: Mickey's Adventures of Mulan

Kingdom Hearts: Mickey's Adventures of Mulan is a sucessful crossover.

Plot
Mickey, Donald, and Goofy encounter their old friend and Summon, Mushu, guarding and guiding a young soldier-to-be, Mulan, disguised as a boy named Ping. The group makes their way to a nearby army encampment, where they persuade the general, Li Shang, to allow them to join after some training. Unfortunately, Ping's attempts to prove himself cause problems for the army and Mickey's party, and when Ping is unmasked as Mulan, things get more complicated still.

Li Shang, outraged by Mulan's gender, kicks Mickey, Donald, Goofy, and Mulan out of the army. Mickey, Donald, and Goofy then follow the man up to the Summit, where they fight a swarm of Rapid Thruster Heartless again and Mickey faces the Mysterious Man, whom Mickey believes to be Sora's friend, Riku after seeing his weapon. After the fight the man disappears. Soon, when Mulan discovers Shan-Yu is still alive after the avalanche she had caused, and also saw the enormous Storm Rider fly towards the Imperial City too, she goes to warn Li Shang. Li Shang refuses to believe Mulan, Mickey, Donald, and Goofy at first, but when Hayabusa is spotted soaring above the palace, Li Shang realizes he was wrong and guards the Emperor while Mickey, Donald, Goofy, and Mulan defeat the Storm Rider, then eliminate Shan-Yu once and for all. The Emperor presents Mulan with Shan-Yu's sword as proof of her bravery.

Mickey then asks the Emperor if the man in the black coat said anything else. Captain Shang answers that the man said "Three wise guys would take care of everything". Mickey smiles, realizing that Riku really was there. After that, Mulan asks if Captain Shang can have a vacation. The Emperor says that he cannot allow this, but that he can have Mulan work with the captain. Mulan eagerly agrees to this and the story of the Land of Dragons ends.