Mahjong Club Nagatacho: Sousaisen

Note that this requires the four-player adapter for the Famicom. It also requires at least one controller that can press Up and Down on the D-Pad simultaneously. On the opponent's turn, hold Up, Down, and B on Controller 3 for a few seconds, then release the buttons. A menu with two options will appear: the first allows you to see the opponent's tiles, and the second engages an autoplay mode where everyone is AI-controlled.