To re-add the homebrew launcher (if you no longer have original sd contents) just follow the steps after you executed your entry-point after you place the required files on your sdcard. If you have luma+rosalina menu, just open rosalina menu and press L+dwn+select and go to Misc. Options and...
Afaik GBA/SNES, etc emulation on o3ds is not exactly possible due to hardware limitations as even eShop SNES titles cannot run on o3ds. Feel free to correct me if I am wrong, that's what I gathered while trying to do things with my o3ds.
@K3Nv2 Snow Day is pretty fun. My only bitch would be the camera controls, when you move around, say down, you have to move the right stick left or right to get camera to turn and get your view, other than that I like it so far.
I just been playing offline, and they give you a few bots here n there on your team to help battle. I don't think it's as funny as the other games tho, more battle oriented than humor, which kinda sucks, but I'm still early in it
Yea, and co-op, but you can also start a pvp session and battle just with friends. You get special skill cards (powers) the more you play. And higher value cards, but you can only enable so many cards at a time.
Toilet paper is considered the money, you collect and buy stuff with TP, kinda funny. Graphics are def better than the other games tho, I think they used Unity 5 engine.