Kara tells you that a dog outside the man's house in Diamond Coast is called Turbo. This is a Quintet staple, and Turbo the dog appears in Soul Blazer, Robotrek, and Terranigma.
In the town of Euro, you can come across a very long line waiting to get into a store. All of the people lining up will say that the store carries a number of interesting potions. You can actually wait in this line, and obtain 2 potions; one which will raise your HP by 1, and another that unlocks an ability for Freedan.