There some guy, that manage to dump ROMs through RAM. Maybe you can ask him what he knows about your problem. https://gbatemp.net/threads/sonic-classic-collection-dumps-and-opcode-fixes.565585/ We're trying to verify the ROMs by dumping them from the .pak, though we have tried dumping them from RAM...

We're trying to figure out how to extract the Genesis ROMs within the Sonic Classic Collection, both the US and European releases. Both releases have 7 ROMs in them; Sonic The Hedgehog, Sonic the Hedgehog 2, Sonic the Hedgehog 3, Sonic & Knuckles, Sonic & Knuckles + Sonic The Hedgehog, Sonic & Knuck...