5schatten i just received my new odroid H2 (J4105 gemini lake)
And only tested dolphin mario kart wii and super mario bros 3+ with native resolution and it’s unplayable.
I think the cpu/gpu is too weak?
Use Vulkan, configure Ubershaders, set the correct refresh rate in rr-config before and stick to the native Wii resolution.
I can play New Super Mario Bros. Wii on my J3455-ITX so it should run fine if you set it up correct.