Capcom vs. SNK Pro/Secrets

Enable "Extra" mode characters
Press and hold the start button while selecting a characters.

Fight Morrigan or Nakoruru
To fight against Morrigan or Nakoruru you must earn at least 60 Groove Points before your fourth fight (in either Arcade Mode or Pair Match Mode). If you selected Capcom Groove, you will face Morrigan. If you selected SNK Groove, you will face Nakoruru.

Fight Evil Ryu or Orochi Iori
To fight against Evil Ryu or Orochi Iori you must earn at least 71 Groove Points before your fourth fight (in either Arcade Mode or Pair Match Mode). If you selected Capcom Groove, you will face Evil Ryu. If you selected SNK Groove, you will face Orochi Iori. These fights will take place instead of any fights with Morrigan or Nakoruru.

Fight Akuma
To fight against Akuma you must earn at least 85 Groove Points before your final fight.