While in Mosperiburg in search for the Shield Card, you can get Suzaku as a playable playable charactor. Defeat the fairie on the first screen, yhen go to the area with three boars in it. You'll see a snowman on the southern edge of the clearing, which takes you to a fight with Jotnar. The Jotnar is really tough. It helps to have Ice Crystals, Gendu Sheilds, and Pearl Hearts to help nulifie its ice and water attacks. Once Jotnar is defeated, return to the previous cave and take the right branch to find a defrosted Suzaku Jr., who joins your party.