I'd say if you can and are willing to make such an emulator then sure, knock yourself out. I'm certain there would be at least a few enthusiasts here. I know that old Java phone games are emulated already and that there is interest in emulating Japanese flip phone games. As far as smartphones go, microtransactions pretty much killed any and all interest I could possibly have so we'd be talking pre-2014 games I think? Not a bad idea to have them archived and playable. For anything more recent than that you'd probably have to emulate in-app purchases like MAME emulates inserting coins but then there wouldn't be much of a game to play since you'd just power through it in 10 minutes with diamonds/crystals/whatever.
This is kind of long. It is somewhat of a Short Inspiration Letter to this community, and others like you all. Maybe you could share with the others around here, to help spread the ideas, to be able to expand them. But other than what was written initially above. What are yours and everybody else's thoughts on this...
What got me really thinking about this idea was watching those, Dev Kit Videos for old consoles, the Youtube Channel called Psp mav, Pspi 6 videos and Psp Lua App. Among other things. One of reasons I mentioned Zenonia as an example is because their is a reddit focused on those games. They even created a remastered version, to be able to play on newer phones. None probably really speaks on this or makes videos. Not a tech person to know how to all this, myself.
With communities like that and the Focused People here on Repo. I say things like this can be done, if all start talking and working together. There is even a channel called SOTN Hacked, who is focused on remaking Castlevania Symphony of The Night, in a brand new way.
Some one was even making a Yu-Gi-Oh Duelists of the Roses Remake: https://ignoresolutions.itch.io/yu-gi-oh-duelists-of-the-roses-remake-beta
Another example is how do you put stuff together like these:
1.)
https://retrogametalk.com/repository/ps2-iso/beats-of-rage/
2.)
https://retrogametalk.com/repository/ps2-iso/3d-fighting-the-best-hack/
Old Blogs wwith guides on how to, like this neogeo cd ps2 one: https://mundowiihack.wordpress.com/2016/08/05/ps2-tutorial-neocd-ps2-v0-6c/
Just look at the Rom Community in general. These are just examples. There's plenty of people out there willing. The ones of you all who are against the Overly Gatekeeping, and are willing to be The Balance, who brings likeminded others together to make stuff like this happen. Would be a major changer. Considering how these Owners of these Game Companies foolishly operate. You all who are willing must take things into your own hands, when it pertains to these things. Don't forget that you all the these Company's Life Support, not the otherway around. It is okay to do stuff like this, if going about it careful, wise, knowledgable and without negative ego or greed. Call out the ones doing foul stuff in you all's communites with aggression. Management. You all must come together, but all be segregated to your own spots, because if all are in the same place then it'll be easier to strike you all.
It would be a great benefit if people started bringing up Ideas like the one I mentioned, and trying to do it. If people can ask around, introduce these things. It may make Communities like Repo and others greater and stronger. Also not just new or old phone games, but other console or handheld games to different platform. This could help bring more eyes to things not known, and more convenient to play and access. Skyrim and Old Monster Hunters have people so focused, they made a multiplayer. Many other examples of unity and team work. Money helps but is ain't all about it. Not all has to be for pay. This could inspire others to share, be more open, to not limit yourself because if don't have dollar, then oh well. This selfish act is the reason for many lost medias, and foul minds. This idea requires Selflessness and Genuine Care. Money gives the excuse. Take that away and have true trade, then you have nothing but yourselves to blame, self-reflect, do better. Grow & Develop and Better Develop. If you know what I mean.
For example, the Sword of Moonlight King's Field Making Tool is could be a good example for introducing and getting others into such things. The game even has a support reddit. Even with translations, games or books. Can be most espically good for kids, teens, young adults. Could help strengthen their minds, interests, social skills and people relations. Because this type of idea is for both online and offline, because some things are not online. So one may have to travel. Travel is good for the youth. Teach them the value of trade aka shares & trust. The actual one that was before the money. Like how it is done between mutual. This strengthens trust, responsibility, dignity, respect, accountability.
Another idea was to, just like retropie and arcade superguns machines, others just previously mentioned. Basically. Do you and others on here think it would be a good idea, to have a section in these forums focused on the breakdown and how to use and build software, with programming? More like the Fan Made Projects & Releases, section on here. Probablt should have put this Topic Idea there, though.
Real in-depth Guides. Where to get them, high or cheap like on temu. Creating videos. Practicing building these not so much to sell, but to help get others, young or old, into this type of stuff. Which can be a gateway for them to be future Rom'ers or whatever. How to do sprite stuff and programming like DBZ Legacy of Goku games. This style of game would do good, re-introduced.
People and Communities like you all are far more imperative, then you all may realize. This is why I say there must be a Push, a Revolution to do and be better. Expand.