Cart RAM clear:
Before power the console on, hold Up + Left + B.
Ending:
At the data load screen, choose the "LOAD" option, while choosing a data slot hold Up + Right + Start and press A.
Catch screen cheats:
All these test are enabled the same way. During the game, select any empty map tile, press A and choose a second option in the menu "A catch", then select an option "Previous records". Press Start a number of times particular to desired effect (see the table below) and press A.
5 times - Sound test.
Source: urawaza.in
8 times - "Live well" viewer. View fish pictures and info in the "Live Well" list if any. Note, scenarios for Stages 5, 8, 9 and 10 does not have such events, so you'll see a corresponding warning message instead.
9 times - Previous Records viewer. View fish pictures and info in the "Previous records" list if any.
