I won't give up, but I hope there's an option to turn dual type moves off.
That could work too. I'm sure even if they have dual-typed moves, they will be very limited. Kyurem's signature moves, and maybe another legendary, but definitely not a TM. That could become too convoluted for damage calculation to work.
If a total of 6 moves are dual typed with very limited options, I can see it being okay. Just nothing like a Dragon/Ice move that slaughters all Dragon types. Also, making Fire Punch Fire/Fighting would be the end of many Ice types…
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