Super Mario World – 1990 Developer Interview
 
http://shmuplations.com/supermarioworld/

This delightful interview from 1990 with the Super Mario World development team was originally featured in the SMW official guidebook. Topics include the overall design, new features like the cape and dotted-line blocks, and the various challenges of working on the new Super Famicom hardware. Finally, there’s an individual Koji Kondo interview (included in volume 2 of the same guidebook) that briefly goes over his history and the music of Mario.