I have never seen a movie like this!
Except, it stirred a vague memory of a redheaded girl named something like Penny (?) who could breathe under water, and who was friends with a dolphin who saved her when she stepped on some poisonous coral. In a movie I watched on the disney channel one sunday as a little girl when I faked being sick so I could stay home from church.
I digress. Anyway, Ponyo was actually kind of funny, and endearing in its own way. What's not to love about a goldfish who sprouts chicken feet and then becomes a human-girl? And a mother with Tina Fey's voice who leaves her 5 year-old and the goldfish girl to fend for themselves in the middle of a tsunami/storm? Grin.