gba 3 in 1 m3 real wireless play

Hey I am new to homebrew on the ds, I usually do this on my psp, but now I have a ds and I am trying to do the same thing. I have a few questions, if you could point me to the correct thread or topic that would be great because I find this forum confusing.

1. Is it possible to play gba roms 2 player
(ie. if I have a golden sun gba rom and I want to play my friend who has the game, can we do that? and if so how?)

2. I just bought a m3ds real with a 8gb micro sd and the gba expansion pack for the m3ds I was wondering how to update it and when it is done if I can delete the update files(like eboot.pbp on the psp)

**edit**

gba expansion pack for m3ds not 3 in 1

1. Not on the DS. There is no port for the linker cable, and you cannot use the DS's wifi abilities while in GBA mode.

2. no clue, sorry.