Famitsu has published its entire interview with Kingdom Hearts 3D co-director Tai Yasue from the April 26 issue. Yasue touched on the title’s gameplay systems, discussing how some elements were created, and more.
You can find a summary of the interview below.
– Drop System forces players to switch between Sora and Riku
 – Tetsuya Nomura requested a system which forces the playable character to change
 – Yasue joked that his reaction to the request was a feeling of fear
 – Yasue was worried about a change in the tempo compared to past Kingdom Hearts games
 – The drop count in the game is just for show, like how the game displays your play time
 – Drop count doesn’t have any other effect on the game
 – Discussions with Nomura led to the “free flow action” system
 – Dev. team began working on the free flow system by using Kingdom Hearts Birth by Sleep data
 – Planned for 2-3 days, developed for 1-2 weeks
 – Resulted in the basic shape that we see in KH3D
 – The team didn’t stray from the system once it was in place, but new elements were added
 – Card-themed mini-game called “Flick Rush” was originally planned to use the 3DS’ camera
 – Would have been able to take a photo of your friend and use that in the mini-game
 – Nomura didn’t approve of the idea, so they went back to the drawing board and ended up with the final trump-based system