finish all of the levels before that. it could take a while because it's the second to last level
You have to seal the keyhole in everyworld (not including Winnie the pooh) then it will be the second last world you go to
You find out later, but if you must know, the pictures are of Hollow Bastian. Hollow Bastian is where most of the main characters are from. eg. Leon, Yuffie, Cloud,etc. Sora says it's familiar because his island is on a more tropical side of Hollow Bastian, though you never see your island again until KH2. So, Sora was just seeing clips of his old home.
Ali Bastian's birth name is Alexandra Bastian.
Noah Bastian's birth name is Noah Dale Bastian.
Bastian Kaltenböck was born in 1983.
Bastian Kolmsee was born in 1981.
Bastian Swillims was born in 1982.
Fritz Bastian was born in 1898.
Fritz Bastian died in 1944.
Wally Bastian died in 1985.
Bastian Seibt was born in 1978.
Bastian Sierich is 172 cm.
Der Bastian was created in 1972.