When I press Menu + L1 in the NDS emulator, the game closes when the pen should appear. Does anyone know how to fix this? Reset the NDS controls or something? I use the rg35xxSP, i think I probably messed up something related to that, but I honestly don’t know…
I have seen that when entering a game and opening the ext-drastic menu by pressing the Menu + X keys normally and then exiting, the NDS pencil is activated normally by pressing Menu + L1 but for some strange reason when playing Mario Kart DS before being able to use the L1 key I must press the X key and then the L1 key works 
I hope this can be of more help