Hello. I'm currently using a US 3DS xl on 4.2 sysnand and 9.9 emunand with Gateway 3.3. I've lately learnt that playing GBA by help of the Ambassador and its injection requires CFW. I've tried installing PASTA CFW using this guide https://gbatemp.net/threads/release-pasta-cfw-without-cubic-ninja-mset-4-x-old3ds.389498/ and had issues at around step 8, so I resorted to trying to use rxTools. I've been able to successfully reach the menu, but that's about it, trying to boot into rxmode sysnand returns me to normal sysnand, and rxmode emunand gives a black screen. So here are my questions: 1) Simply confirming, is it absolutely impossible to play GBA games full speed on Gateway? 2) Would it be possible to use both Gateway and a CFW (note that I do have 2 SD cards, the 4GB that came with the 3DS and a 32GB that I've upgraded to)? 3) Which CFW would be best to use for the sole purpose of playing GBA games? 4) How can I install said CFW without the Cubic Ninja game, if possible at all? UPDATE: I've upgraded my sysnand to 8.1 and after doing so I managed to boot rxMode via browser exploit on emunand 9.9 and successfully boot GBA games. Gateway mode worked perfectly too. However, the blue gateway card, and therefore, I no longer had access to DS games nor DS Profile exploit. So i find myself between two rather imperfect situations 1) sysnand 4.2, emunand 9.9, gateway only. DS and 3DS games only. 2) sysnand 8.1, emunand 9.9, gateway and rxTools. GBA and 3DS games only. It goes without saying that it'd be dangerous to upgrade and downgrade my sysnand frequently, and I have tried installing the bluecardfix.cia from Gateway, but that didn't fix my blue card on 8.1. So here again I find myself asking what to do in order to get GBA, DS, and 3DS games working together without having to upgrade/downgrade my sysnand everytime I want to play GBA/DS games on my 3DS. Sorry for bothering you people and thanks to everyone that helped so far.