Thanks @DavidBurgos I'll take a look on my 2 slot and report back.
Double Dragon
This is the discussion for Double Dragon in the game database, where you can also see its collection and compatibility reports.
Compatibility reports for Double Dragon
From the game page, where reports can be added or verified.
Works Fusion on NEO-AES (with daughterboard), 5V, North America console
Reported by DavidBurgos on Sep 6, 2026. Verified by 0 others.
Works with issues Fusion on NEO-AES 3-6, 9V, Japan console
Reported by Gamesboro on Sep 8, 2026. Verified by 1 other.
Issues: Freezes / crashes
Got an Address Error when using Billy vs. Abobo in Abobo's stage. Abobo was being played by CPU in normal mode and hit Billy with hammer blow resulting in the error. Need someone to verify this as it might be a ROM issue on cart and not related to Fusion.
Verified by DavidBurgos: No error noted (specially in Billy vs Abobo) in the US 5V AES System. I suggest using the cart on the MVS to check the roms.