There is an Android application that helps to do that stuff if we don't have normal network nearby (and probably even if we don't have any Wi-Fi/GSM access).
As far as I know Gateway can do on firmware 4.5-9.2 (9.2.0-20 to be precise), and emunand probably up to 9.2.0-20 as well.
About network play, not tested yet, some people including the creators of Gateway claim that network play works just fine.
Homebrew is accessible even with Cubic Ninja ROM (flip you Cubic Ninja high prices mwahahaha), maybe there is some other way, dunno.


I remember Acekard AKAIO had something similar, some kind of anti-fake-Acekard thing, not sure how much harm it was doing, but looking at the admin of AKAIO forums I would guess as freaking much as possible :3

Last thing about Gateway:

To be honest I haven't figured that out yet, but yeah they say it's possible.