Remember that no jailbreak is needed!
Step 1: Go to the Website
This is the website were you will download the "Gameboy". Before i give you the link, here are the instructions. TURN YOUR DATE TO 2012 IMPORTANT!!! Then, drop down the options and select "GBA4iOS", then download. http://emu4ios.weebly.com/downloads.html
Step 2: Once Downloaded
Once downloaded, it will look like the picture. During the download, your date needed to be 2012 or it wouldnt work. KEEP IT AT 2012, open it 1 time, close it then change your date back.
Step 3: Once Your Date Is Changed Back, Open the App Again.
Once you open the app again, it should look like the picture except empty. Click the little search icon in the corner, and it will bring you to a webpage. Navigate around the website to find games you want, i just beat pokemon emerald. Once you click the one you want, it will bring you to another page. Scroll down and click downpad, then click open in GBA4iOS. Then, your done! Also, if your device runs out of battery, you will have to turn your date to 2012, open the app one time, then turn back to 2013.
Step 4: Enjoy Your Game!
Enjoy and remember, always choose mudkip because AH HERD YU LEIK MUDKIPZZ!!!!