River King Mystic Valley - Complete - Nintendo DSJourney to rivers, swamps, ponds and hidden fishing spots as you look for the mysterious River King to help your younger sister wake from her unexplained slumber. But you are not alone on this adventure, make friends with the magical creatures of Mystic Valley and unlock their special abilities to help you. You are your sister's last hope and it will take all of your fishing skill to catch the elusive River King!