Game Boy Advance emulator with link, for Trisquel or Android

Gaming consoles are usually heavily copyright encumbered. So I could only say "good luck".

Note: In certain extreme cases, it was very hard to dump the game ROMs from official consoles/cartridges, as they have certain self-destructing or anti-tampering protection mechanisms. You are already so lucky to have lots of GBA ROMs.

While I'd love an upgraded libre GBA Clone with fun libre homebrew with no non-libre software and there would be nothing freedom disrespecting about that.

If you're going for 100% freedom emulators aren't the way to go unless you don't need a non-free Bios and the roms you're playing are libre. Even the ASM dumped Pokemon Gen 1-3 Games that have been reverse engineered for ages weren't exactly clean room efforts. Also I think most games have anti-reverse engineering clauses in the EULA in their manuals.

In first place thanks for both replies.
In second place, I am aware of the discussion around emulators... are they legal or not, are they acceptable in a freedom-perspective or not, etc etc etc. I am aware of that. And like anyone else I have my own standing in those regards, namely the fact that I don't see any harm/danger in running a FLOSS emulator of an old console (NES, Genesis, SNES, Game Boy, etc). I wouldn't even think of using something that was made to be internet-aware. But older stuff, yeah I go with that. Is it better to play a libre game like supertuxkart in my GNU system? Yes it is. But I sometimes like to play those other games that are not made anymore and I don't have a problem with that.

So with that in mind, I was hoping for help in a more technical way...
I found out that github has lots of emulators made by lots of people, some written in C, some in other languages, but I didn't find yet what I am looking for. To clarify:

1. I want a GBA emulator for Android.
2. I want a GBA emulator that supports link (preferably in local computer).

I found a project called GBA.js it's a Javascript implementation of an emulator. It's under a free license and you can use it online, but it's also possible to run it locally. BUT I have been unable to run it locally, even trying to run the index.html doesn't give me the proper UI and it doesn't load a rom from my disk.

Any help is welcome ;)

Again, thank everyone for the replies.

I don't wish for this thread to become another "debate" over emulators being OK or not in the Free Software world. That debate has happened before and everyone has a different view. Let's stick to the technical aspect of my post please.

I found a very nice emulator, called mGBA, which is already being included in Debian unstable, and will later come as part of Ubuntu, and therefore Trisquel. It's FLOSS and a very nice project. I was able to avoid having to build from source because they have deb files available (the latest version is supposed to run on Ubuntu 16.04 but I was able to install it in Trisquel 8 without issues).

Also, the developer has a nice article about the need or not for BIOS/ROM files for emulators to work, and how to get those. It's very interesting read for hackers (which we all are in a way, since that is the philosophy of running GNU).

If this thread is causing any problems for the members, I will let the Mods decide to move this thread to the Troll Lounge. Keep in mind I was asking for Free Software emulators, precisely because I didn't want to run proprietary ones (there are many available). But I will respect the decision, please just let us know here in the comments please.

Also, I am still looking for a solution for Android. I found GameBoid in F-Droid archives but can't get it to work and besides it's very old software, I would prefer something newer. I am still open to suggestions for this scenario. As for GNU, I will suggest mGBA if VBA doesn't suit your needs.

Thanks everyone.