if you mean on DS, insert the game cartridge and press the rightmost button, if you have a separate GB game cartridge.
No, the R4 will only play Nintendo DS Games and Homebrew.
No you can't Killian
No. R4 cards can support Slot-1 games whereas other emulation devices such as the EZflash 2-in-1 which is a Slot-2 device can play GBA games
Yes, you can. If you have a M3 or an R4 for the Game Boy Advanced, you can insert .gba roms into the micro SD card to play them.
No you can not cause if you try inserting either r4 revouloutin (reccomended by me) or a game it wont fit
Basically a R4 card lets you play homebrew applications like a NES emulator which lets you play NES games.
with an r4 you can. you can download leaf green onto the r4 then play it through the ds slot.
nope
It does but you have to create a save file after you open the game
I don't know how to for Pokemon game boy games. but for ds cartridges you will have to get either action replay or R4.
No
Flip your ds over. You will see a piece that can be removed when pushed up. That is the gba slot. Have fun! Yes the slot is on the bottom like the post above says. But be warned, old gameboy games (big square ones like gameboy, gameboy color) can't be played on your DS.