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by eropple 2531 days ago
I read this and was shocked - surely this is incorrect!

Nope. Paperboy uses a CNROM, which is basically an MMC3. Maybe they're doing some clever edge-replacement stuff on the mirrored table, like SMB3 does with the same hardware? But you can see glitching when SMB3 does it.

(edit: my sibling post answers it. That's slick.)