The screws used on the chassis of the DSi can be taken out with a normal cross slot screwdriver. The screws in the picture appeared after a plastic cover was removed. (Click picture to enlarge)
The screws used on the chassis of the DSi can be taken out with a normal cross slot screwdriver. The screws in the picture appeared after a plastic cover was removed. (Click picture to enlarge)

[DSi Teardown] Screws Not Same as in DS [Part 1]