Tutorial: Duplicate Jokers using the White Whale Bug Balatro Demo - YouTube

The Square Joker is a common Joker which provides a chips bonus that increases by +4 Chips every time you play a hand with only four cards. The four cards played do not have to score and all four can be debuffed. This Joker cannot receive the Perishable sticker.

As of update 1.0.1f-full there are 150 total jokers of varying rarities with 105 unlocked from the start and 45 unlockable through specific conditions.

Once a Poker hand is played Blueprint will continue copying the last Joker to its right even if its moved around afterward. This can be exploited by first playing the winning hand then moving Blueprint to copy the end-of-round effect Joker such as Reserved Parking or Mime while scoring is calculated.