King Zora
For The Legend of Zelda: A Link to the Past & Four Swords on the Game Boy Advance (GBA).
Wares
Wah ha ha! One pair of Flippers coming up. I will give you a free bonus with your purchase. I will let you use the magic water ways of the sea folk which link lakes and rivers. When you see a whirlpool, dive into it. You never know where you'll surface! Wah ha ha!
Clerk
Map

What the clerk says
Talking to him
Wah ha ha! What do you want, little man? Do you have something to ask me? ▶ I want the Flippers I just dropped by
Asking for the flippers
Wah ha ha! But I don't just give Flippers away for free. I sell them for 500 Rupees a pair. What do you do? ▶ Pay 500 Rupees Quit after all
Wade back this way when you have more Rupees... Wah ha ha! I'll see you again!
Just dropping by
Great! Whenever you want to see my fishy face, you are welcome here. ... Wah ha ha! Good-bye!