Contrary to popular belief, the Janken battles in Alex Kidd in Miracle World are not RNG-based, but instead always have a set winning move.

•Stone-Head: Rock, Scissors
•Scissor-Head: Scissors, Paper
•Paper-Head: Rock, Scissors
•Stone-Head Rematch: Rock, Scissors
•Scissor-Head Rematch: Rock, Rock
•Paper-Head Rematch: Rock, Scissors
•Janken the Great: Paper, Paper

If you incorrectly answer, that will change the answers from that point on.

In the Sega Ages release of the game for Nintendo Switch, one of the game's borders has the correct Janken moves on the top and bottom.