On your iPhone open up Safari then type in the search bar m.coolrom.com and then it gives an assortment of Emulators to download and then you can download roms off CoolRom's website. IF you want the MLP roms I will tell you how to add those.
@K3Nv2 I got some cheapies at wallys, that are pretty good, already have lost a few expensive ones (one falls out and gone, can't find) while cutting grass so bought some cheap ones, and of course never lose these cheap ones. (Cheap meaning only $35, compared to air buds which I only have 1 of 2 now)
Click on your profile pic in the top right corner, and you'll get the profile menu popup, with the profile icon highlighted at the top, and the "bookmarks" banner next to it in gray. Click on that icon and you'll get a list of your bookmarks.