Total count list
At the title screen, press Up, Up, Down, Down, L1, R1, L1, R1, X, Circle, Start. Then, press Select at the options screen.
Big fish
At the lure selection screen, press Triangle + Circle + Square + X + R1 + R2 at the same time.
Unlock Concave Dam
Play the game 50 times.
Attract Fish
At the title screen, press triangle, X, O, Square, Up, Down, Left, Right then just fish and catch all the fish you want.