Raspberry Pi 4
For information, Recalbox IS NOT compatible with Raspberry Pi 4 yet.
Pour information, Recalbox N'EST PAS encore compatible avec le Raspberry Pi 4.
The Recalbox Team.
Killer Instinct MAME retropie
I do not know if it is known to you, or if this is old, but for the case it appeared to me today:
well, the emulation seems flawless. seems like an improvement over other n64 emulators. i never used scanline filters btw so i'm not sure
I tried KI in advmame ... it was running at 5fps ...
But I'm pretty sure it can't run at even 80% of the original speed on a pi3
Killer Instinct 1 and 2 should be working in MAME 2003 but there is a bug that currently prevents it. There is now a bounty open to raise the funds to attract a coder to fix this bug.
The most likely way get these games running would be to contribute to the bounty: https://www.bountysource.com/issues/35638008-regression-in-killer-instinct-1-and-2-support