Alright I know what you're thinking "aren't there already guides on how to run these games on mobile", to which I say yes but those are either outdated and/or lack a very useful tool which is MapConverter which will increase your performance and fix a lot of bugs in general. So please if it's not to much trouble, give this post an upvote and a reply so that it's easier to find on google for wayward souls like me who are obsessed with playing these games on mobile.
The Easy Way (Apple & Android) - Steam Link app or something similar
While this isn't my favorite method it gets the job done and is also accessible on apple. Rather than trying to emulate the game on your phone it's a lot easier to access your computer remotely and just control the game with your phone. There's a lot of apps that do this but I'm going to walk you through how I did it with Steam Link. For this you will need:
The Steam Link App
A Steam account as well as the desktop app
a lack of paranoia
For whatever it's worth while giving outside control to your PC to a third party seems pretty sketchy I haven't had anything bad happen to me, I haven't been hacked or anything similar either.
Anyways back to the guide.
First login on the steam link app
open steam on your computer (make sure to be logged in)
On the steam link app open up settings then tap "computer" once it has found your computer select and exit out of settings and press play, it will then prompt you to enter a PIN on your computer
Then on the desktop version of steam click on the word steam in the top left corner, it should give you a drop down menu, select settings.
Once the settings dialogue box pops up you'll want to click on the remote play tab, click on Pair Steam Link and then enter the PIN that you got earlier. It will take a moment to verify the connection
exit out of settings and hit play
Then if you launch whatever game you want you should be good to go. (for something like reborn I highly recommend using a mod that allows you to click things.)
IF you mess around with the settings enough you should be able to find something that works well for you.
And now for the Cool way
The Hard way - Android only - With Joiplay
Joiplay is a fantastical technology that through some occult ritual allows you to run RPG maker games on your phone. So far I've tested Pokemon Reborn, Rejuvenation, Insurgence and Uranium and they have all worked. (Unfortunately games like Pokemon Phoenix Rising which run off of a modified version of RPG maker seems to be off limits for now)
Setting up Map Converter (you don't necessarily have to do this but I recommend it)
Download MapConverter from here onto your desktop, and take the .exe file out of the .zip file you got
Download the game you want to play on mobile onto your computer
Extract the game (if it's a .zip file)
Move the mapconverter.exe file that you downloaded first into your game's folder and double click it to run it,
Keep your cursor on the window that it opens, it won't run in the background
wait a little bit
once the loading bar finishes you should be all set to...
Setup the Game with Joiplay
Download Joiplay, you can find it as an APK on their Patreon or as a an app on the google play store (I recommend the playstore option, things will be simpler in the long run)
Download the RPG maker plugin, also available on the appstore and Patreon
Download your game of choice onto your phone (or tablet I guess)
Extract the game (if it's a zipped file) into a folder onto your phone and remember where you put it - you might need to download another app to do this, I recommend File Manager (there are multiple apps under that name, choose the one with green in it's icon)
open up Joiplay, press the plus at the bottom right and you'll be presented with a dialogue box
Put anything you want into the name slot, it doesn't make a difference
Tap the choose file button - navigate through your files to your game and then select the .exe file that launches the game. (The thing you double click to launch it on desktop)
Choose a icon for the game (optional)
Hit done, your game should now show up as a button on the main screen of the Joiplay app.
Tap on said button and launch it, hopefully everything should be good to go.
Please let me know if I can explain any of this better and/or if you're having trouble getting this to work for yourself. Also I know of a way to sync your progress between Joiplay and desktop but I'm tired, let me know if you want me to add a section on that and I will.