In this tutorial I will show you my complete setup on my Pis these can be adjusted for either Pi 1 or Pi 2 only differences will be the minor adjustment of the overclock settings if you so choose to do so. This tutorial is recommended to be used with a PlayStation 3 controller whether wireless or wired but will assume you want it wireless using a usb bluetooth adapter. This tutorial assumes you know how to either login to your Pi via putty or through the Pi directly.

The scripts provided will setup your Pi to run the following emulators.

Genesis
Game Gear
GameBoy
GameBoy Advance
GameBoy Color
Sega32x
SegaCD
PlayStation
Nintendo
Super Nintendo
Nintendo 64

Everything will and can be completed in 4 quick steps. From start to finish I was able to complete in less then 20mins only using 4 scripts and using a gui 3 times. I will break the codes down for the post but will provide quick and easy copy and paste scripts. You will need to provide your own roms and manually upload them but everything else is streamlined.

Preffered Hardware:

Raspberry Pi2
8gb MicroSD card
USB Bluetooth Dongle
PlayStation 3 Controller

## Begin Installation – Write down IP Address

sudo raspi-config

## Extend Filesystem, Reboot

cd && sudo apt-get update && sudo apt-get upgrade && sudo apt-get install bluetooth bluez-utils blueman && sudo raspi-config && sudo apt-get autoremove && sudo reboot

## Hit [Y] if needed, Switch Overclock Settings, Split Memory 384, Force Audio HDMI, Exit

cd && shopt -s extglob

## Enables shell expansions

cd && sudo chmod 777 -R /home/pi/RetroPie/roms && sudo rm -R /home/pi/RetroPie/roms/* && sudo mkdir -m 777 /home/pi/RetroPie/roms/{gamegear,gb,gba,gbc,megadrive,n64,nes,psx,sega32x,segacd,snes}

## Permits, removes, and adds roms folders

cd && sudo chmod 777 -R /opt/retropie/configs && sudo rm -R /opt/retropie/configs/{atari2600,atarilynx,c64,doom,fba,mame,mastersystem,mastersystem-genesis,msx,pcengine,quake,vectrex} && echo -e 'input_menu_toggle_btn = "9"\naspect_ratio_index = "1"' >> /opt/retropie/configs/all/retroarch.cfg && echo -e 'input_player1_b_btn = "13"\ninput_player1_y_btn = "14"\ninput_player1_select_btn = "0"\ninput_player1_start_btn = "3"\ninput_player1_up_btn = "4"\ninput_player1_down_btn = "6"\ninput_player1_left_btn = "7"\ninput_player1_right_btn = "5"\ninput_player1_a_btn = "10"\ninput_player1_x_btn = "12"\ninput_player1_l_btn = "15"\ninput_player1_r_btn = "11"\ninput_player1_l2_btn = "8"\ninput_player1_r2_btn = "9"\ninput_player1_l3_btn = "1"\ninput_player1_r3_btn = "2"\ninput_player1_l_x_plus_axis = "+0"\ninput_player1_l_x_minus_axis = "-0"\ninput_player1_l_y_plus_axis = "+1"\ninput_player1_l_y_minus_axis = "-1"\ninput_player1_r_x_plus_axis = "+2"\ninput_player1_r_x_minus_axis = "-2"\ninput_player1_r_y_plus_axis = "+3"\ninput_player1_r_nus_axis = "-3"' >> /opt/retropie/configs/megadrive/retroarch.cfg && echo -e 'input_player1_b_btn = "13"\ninput_player1_y_btn = "14"\ninput_player1_select_btn = "0"\ninput_player1_start_btn = "3"\ninput_player1_up_btn = "4"\ninput_player1_down_btn = "6"\ninput_player1_left_btn = "7"\ninput_player1_right_btn = "5"\ninput_player1_a_btn = "10"\ninput_player1_x_btn = "12"\ninput_player1_l_btn = "15"\ninput_player1_r_btn = "11"\ninput_player1_l2_btn = "8"\ninput_player1_r2_btn = "9"\ninput_player1_l3_btn = "1"\ninput_player1_r3_btn = "2"\ninput_player1_l_x_plus_axis = "+0"\ninput_player1_l_x_minus_axis = "-0"\ninput_player1_l_y_plus_axis = "+1"\ninput_player1_l_y_minus_axis = "-1"\ninput_player1_r_x_plus_axis = "+2"\ninput_player1_r_x_minus_axis = "-2"\ninput_player1_r_y_plus_axis = "+3"\ninput_player1_r_nus_axis = "-3"' >> /opt/retropie/configs/sega32x/retroarch.cfg && echo -e 'input_player1_b_btn = "13"\ninput_player1_y_btn = "14"\ninput_player1_select_btn = "0"\ninput_player1_start_btn = "3"\ninput_player1_up_btn = "4"\ninput_player1_down_btn = "6"\ninput_player1_left_btn = "7"\ninput_player1_right_btn = "5"\ninput_player1_a_btn = "10"\ninput_player1_x_btn = "12"\ninput_player1_l_btn = "15"\ninput_player1_r_btn = "11"\ninput_player1_l2_btn = "8"\ninput_player1_r2_btn = "9"\ninput_player1_l3_btn = "1"\ninput_player1_r3_btn = "2"\ninput_player1_l_x_plus_axis = "+0"\ninput_player1_l_x_minus_axis = "-0"\ninput_player1_l_y_plus_axis = "+1"\ninput_player1_l_y_minus_axis = "-1"\ninput_player1_r_x_plus_axis = "+2"\ninput_player1_r_x_minus_axis = "-2"\ninput_player1_r_y_plus_axis = "+3"\ninput_player1_r_nus_axis = "-3"' >> /opt/retropie/configs/segacd/retroarch.cfg && sudo sed -i 's/3 button pad/6 button pad/g' /opt/retropie/configs/all/retroarch-core-options.cfg

## Permits, removes, edits configs folders and files

cd && sudo chmod 777 -R /opt/retropie/emulators && sudo rm -R /opt/retropie/emulators/{advmame,atari800,basilisk,cpc,dgen,dosbox,fbzx,gngeopi,hatari,jzintv,linapple,mame4all,mupen64plus,osmose,pifba,pisnes,scummvm,snes9x,uae4all,vice}

## Permits and removes emulators folders

cd && sudo wget -P /opt/retropie/emulators/gpsp [PLEASE DO NOT POST LINKS TO ROMS]

## Downloads GBA Bios Files

cd && sudo chmod 777 -R /home/pi/RetroPie/BIOS && sudo wget -P /home/pi/RetroPie/BIOS [NO LINKS TO ROMS] && sudo unzip /home/pi/RetroPie/BIOS/bios.zip -d /home/pi/RetroPie/BIOS/ && sudo rm -R /home/pi/RetroPie/BIOS/bios.zip

## Downloads Other Bios Files

cd && sudo chmod 777 -R /etc/emulationstation && sudo rm -R /etc/emulationstation/themes/simple/{3do,amiga,amstradcpc,apple2,atari2600,atari5200,atari7800,atari800,atarifalcon,atarijaguar,atarijaguarcd,atarist,atarixe,c64,colecovision,dreamcast,fba,gc,intellivision,macintosh,mame,mastersystem,msx,nds,neogeo,ngp,ngpc,pc,pcengine,ports,ps2,psp,saturn,scummvm,wii,xbox,zmachine,zxspectrum,readme.txt}

## Permits and removes theme folders and files

sudo sed -i 's#<textlist name="gamelist">#<textlist name="gamelist">\n\t\t\t<scrollSound>./sounds/coin.wav</scrollSound>#g' /etc/emulationstation/themes/simple/simple.xml && sudo sed -i 's#.zip .ZIP##g' /etc/emulationstation/es_systems.cfg && sudo sed -i 's#<extension>#<extension>.zip .ZIP #g' /etc/emulationstation/es_systems.cfg

## Adds Menu Sounds and Fixes Zip support

sudo wget -P /etc/emulationstation/themes/simple https://www.dropbox.com/s/mraax8scjkwmtr6/themes.zip && sudo unzip -o /etc/emulationstation/themes/simple/themes.zip -d /etc/emulationstation/themes/simple/ && sudo rm -R /etc/emulationstation/themes/simple/themes.zip

## Downloads Theme Files

cd && sudo chmod 777 -R /home/pi/RetroPie-Setup/supplementary/splashscreens && sudo rm -R /home/pi/RetroPie-Setup/supplementary/splashscreens/* && sudo wget -P /home/pi/RetroPie-Setup/supplementary/splashscreens/ https://www.dropbox.com/s/zkttf762vxwu56l/splashscreen.png

## Permits, removes, and downloads splashscreens

cd && sudo chmod 777 -R /etc/splashscreen.list && echo -e '/home/pi/RetroPie-Setup/supplementary/splashscreens/splashscreen.png' > /etc/splashscreen.list

## Edits the splashscreen.list

cd && sudo /home/pi/RetroPie-Setup/retropie_setup.sh && sudo /opt/retropie/supplementary/ps3controller/sixpair

## Install PS3 Controller Drivers

cd && read -p "Press [Enter] to continue after you have uploaded some roms manually..." && clear && echo You Have Completed The Installation of RetroPie && sudo shutdown -r 1

## Complete Installation

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You can download the txt file below for a easier streamlined code. It basically sets up your Pi in 3 Scripts with full featured bluetooth wireless PS3 controller with all configs, bios, etc.