Actually, this doesnt emulate any click, it actually is a full gb emulater for gba, if all i did was emulate that click, then we could play gbc also.
There is no way to flip that switch thru a flashcart, that is what the bridge was for.
Heres the full lowdown. The gba has the gb hardware also, when you put a gba cart in, it uses the gba hardware, but gb games are set up differently, so you have to use the old hardware, when a gb or gbc cart is put it, it flips a switch inside the cradle, that makes it use gb hardware. The bridge basicly made you flash cart a gb flash cart by changing it to the correct voltage, and flipping that switch, but even then when u had the bridge on, you could only play gbc or gb games, then you could plug the cart in directly to play gba games. What goomba does is its just like drsms or pnes, it emulates the gb for use with the gba, so now we no longer have to correct the voltage, cause the gba can use gba hardware to play. There is a reason ninny used both hardware, because the gba is not strong enough to emulate gbc, or im sure ninny would put a emu in the hardware, but sadly, if you wanna play gbc, your still gonna need a bridge, inless flubba knows somthing ninny doesnt.