(rewriting question...)
Does any game which uses 8k of CHR RAM (and no other chr ram/rom) do CHR bankswitching within the 8k? It would be quite silly to do so, since it's just rearranging the same memory into a different configuration, but do any games do it? The Waixing DQ4 pirate breaks if you emulate the MMC3 CHR bankswitching to change the mapping of CHR ram.
Does any game which uses 8k of CHR RAM (and no other chr ram/rom) do CHR bankswitching within the 8k? It would be quite silly to do so, since it's just rearranging the same memory into a different configuration, but do any games do it? The Waixing DQ4 pirate breaks if you emulate the MMC3 CHR bankswitching to change the mapping of CHR ram.