Kuray Infinite Fusion (KIF) is a fork of the Pokemon Infinite Fusion fangame which adds countless new features including infinite colors for shinies, mod support, improved AI, multiple QoL changes ...
If you want a fused version of Kyurem, you’ll need to nab Volt Fusion Energy and Blaze Fusion Energy in Pokémon Go. You can mainly grab this from doing raids against Black and White Kyurem ...