Best way to play Game Gear games on CFW 3DS

It's hit or miss Lunar IPS patching GG roms to SMS. I tried this on Shinobi II - The Silent Fury (U), but the start button doesn't work in PicoDrive.

• [smspower.org] Game Gear to Sega Master System

Unless someone ports the retroarch's Genesis Plus GX core ala standalone bubble emulator, you're left with the S8DS emulator through either TWiLight Menu or DS flashcart.

For the retroarch / Genesis Plus GX, the largest & cleanest resolution while maintaining the Game Gear's 10:9 aspect ratio.

• Tap the bottom half of the touchscreen → MAIN MENU → Settings → Video
  • Aspect Ratio: Custom
  • Custom Aspect Ratio X Pos.: 70
  • Custom Aspect Ratio Y Pos.: 3
  • Custom Aspect Ratio Width: 260
  • Custom Aspect Ratio Height: 234
  • Integer Scale: OFF

If you try other settings scaling this to the screen's 240 px height, the width wouldn't be whole number (266.667 px), leading to jaggies.

 

The GG VC injector is the best way to play Game Gear on 3DS models if there are specific titles you wish to play. The emulator iself was built by M2, has great compatibility and flawless performance on all models

https://gbatemp.net/threads/release-ultimate-gg-game-gear-vc-injector-for-3ds.437226/

 

If you want fullscreen, M2 did an excellent job with their scaling algorithm for the VC. It reflects the original aspect ratio of the GG (stretched pixels and all) with exactly doubled horizontal resolution on the 3DS screen, so it appears much sharper than the gameboy VCs. They also do a nice job with the filtering to handle vertical irregularities, better than anything you can manage with retroarch.