So I have beat all 12 Mushroom XIIIs except for No.1, which spawns in The World That Never Was, which in my case is not spawning. I'm at the alter of naught so I cant progress anymore. and also the mini game doesn't show up on the journel. is this bugged? or am I doing something wrong or am I missing something? thanks for the help. 

you need to beat the main game first before No. 1 shows up the reason is the same reason why you can't fight Xemnas Data battle until you have beaten the game because you also fight him in his final form in the data battle so just beat the game because once the credits is done you will see your battle report and then be given the option to save and then your file will have a golden crown so you can fight Mushroom No. 1 and Xemnas Data battle and the Lingering Will

Ah ok. thank you so much. I was afraid there was a bug that prevented it from spawning. I didn't wanna do all of that again on another playthrough. Thanks again

you need to beat the main game first before No. 1 shows up the reason is the same reason why you can't fight Xemnas Data battle until you have beaten the game because you also fight him in his final form in the data battle so just beat the game because once the credits is done you will see your battle report and then be given the option to save and then your file will have a golden crown so you can fight Mushroom No. 1 and Xemnas Data battle and the Lingering Will

Wait, I though Mushroom No 1. appeared after the first Xemans battle, the one at Memory's Contortion?

Wait, I though Mushroom No 1. appeared after the first Xemans battle, the one at Memory's Contortion?

Mushroom No. 1 does show up at Memory Skyscraper or whatever it is called where you encounter Roxas when you first enter The World That Never Was but you have to beat Xemnas both of the times idk why it works that way it just dose

Mushroom No. 1 does show up at Memory Skyscraper or whatever it is called where you encounter Roxas when you first enter The World That Never Was but you have to beat Xemnas both of the times idk why it works that way it just dose

So, all 5 times!? (Xemnas, Armored Xemnas, World of Nothingness, Captain's Seat, and Final Xemnas) Wow.

The Xemnas data battle is 2 parts, the first one where only Sora fights him, then the 2nd one where Xemnas is wearing the white cloak in the realm of nothingness or whatever that place is. So yeah the data battle would have to appear after you complete the game.

Like he is a big deal. Just use reflega to his first form.

Or are you on critical. That is what you get .