Downtown Special - Kunio-kun no Jidaigeki Dayo Zenin Shuugou! [Model TJC-J6]

CPU control:
At the game mode selection screen before the game start or during the game, move cursor to the character selection option, hold Down + B on controller 1 then press Start. If done right, you will automatically start a new or continue current game, but now when any encounters appear on the screen, your character will fight automatically, just like your CPU opponent. Anyway, you still can control it yourself and fight if you want, or travel by your own. You can see if cheat is working, when your character will always turn face-to-face to your CPU controlled player if you stay still a while.

4-Player mode:
At the game mode selection screen, before the game start or during the game, move cursor to the character selection option, hold Right + B or Left + B (according to the game mode you prefer) on controller 1 then press Start. If done right, you will automatically start a new or continue current game. From now, all enemies encounters will be controlled with a 4-Player controller for the Famicom instead of a regular CPU AI.