Although every review or video that mentions it can run ps2 and gamecube. It can't. Also aethersx2 has been abandoned and is closed source. Also android sucks.
But so far its a really nice ps1 portable device. Usually I'd use my vita but I'm always worried about damaging it and they're not exactly in production so I wanted something more disposable with L2 and R2 buttons. Now i can play Abe's Odyssey/Exodus on the train :D
I think it was for this device but I believe retro game corps (on youtube) had a video on tweaks/hacks to get PS2/GC emulation running to a passable level. Worth a shot
I do follow him and I'm also a ps2 emu power user so know all the tricks. Problem with ps2 is some games are incredibly demanding to run while others not so much. Still doesn't solve the arm port being abandoned and closed source though. And games mentioned as being playable on retroid tend to have a very loose definition of playable, issues like major graphics bugs and constant drops below 100% speed with audio crackling are considered "playable" by some.
Fortunately my phone is powerful enough to brute force the ps2 library so i got an 8bitdo controller and mount for that.