The BUILDTIME text file is printed on the top of the screen.Here's an explanation of some of the info on it:
It was used by the developers to debug crashes and other errors in the game since it helps pinpoint exactly where an issue occurred in the code. This screen also exists in Animal Crossing: Wild World and New Super Mario Bros. Super Mario 64 DS is a remake of the N64 original, adding minigames, new playable characters, new areas, improved graphics, and 30 more Stars to collect. This game has hidden development-related text. Also known as: Shényóu Mario DS / 神游马力欧 DS (CN)