For some reason Nintendo doesn’t want you to open up the gadgets you buy from them. So, they use the “security by obscurity” method of fastening. This is just the sort of thing that drives makers, modders, hackers, and tinkerers nuts. Mr. Jalopy covers this very nicely in the Maker’s Bill of Rights.
Two tiny little tri-wing screws stand between you and the innards of the Wii game console’s nunchuck controller. So, you can either try messing up a slotted precision driver you already own, or spend $4 on a specific #0 tri-wing screwdriver. I opted for the latter. I’ll see how it does once it arrives.