Capitalism proving the people can provide a service better than a corporation example 69
Just get an emulator for your phone or get the apks from a reputable source 
Also with no profit motive
I don't know about all of these games, but Sonic CD for example has widescreen support added. Getting proper full screen with emulation is usually a pain ime.
Where do you usually get your mobile apps/games from? I've struggled more with that then PC or even console piracy.
Because I'm a stinky nerd that hates phone games, I don't game on my phone really 
But on the rare chance I need a discontinued apk I just use apkmirror
The 9 games:
Crazy Taxi Classic
Golden Axe Classics (Golden Axe I, II, and III)
Shining Force Classics (Shining Force I, II, and Shining in the Darkness)
Sonic CD Classic
Sonic the Hedgehog 4 Ep. II
Streets of Rage Classic
Streets of Rage 2 Classic
Super Monkey Ball: Sakura Ed.
Virtua Tennis Challenge
Tabletop, DnD, board games, and minecraft. Also Animal Crossing.
3rd International Volunteer Brigade (Hexbear gaming discord)
Rules