Easy Prizes
In any of the game play modes (including practice), take your boat over to the waterfall and search for the opening on the left-hand side. Go there and cast your pole into the water using a lizard reel. Continue casting until you begin to catch fish. This area contains at least three fish and sometimes a big prize that can help you significantly in upcoming competitions.
Never Break Line
Breaking your line while reeling in a big fish is one of the most common and frustrating problems this game has to offer. To ensure that you never break your line, hold down the "A" button after the fish is on the line and never yank or jerk the controller (even if the game tells you to). Reel in the fish with a steady fluid motion, and the line will remain intact.
Catch the Biggest Fish
To catch the biggest fish in the game, use your frog reel and reel your line in very slowly from any location. Eventually, you will hook the biggest fish in the game. Use the "Never Break Line" cheat to reel him in without any problems.
Catch Biggest Bass
To catch the biggest bass fish in the game, go to the dock on the left-hand side of the screen and fish on the inside of the two docks. In these waters, you will eventually find a 26-pound bass. Once again, use the "Never Break Line" cheat to reel him in safely. Note: To catch this fish, you must be playing in Time Trial mode on the Normal difficulty.