Red Coins

Red Coins are very similar to Coins in I Wanna Be The Guy 2, but are instead found in Secret Zones, which are hidden within Secret Stages to each chapter. They are the reward for completing said Secret Zone, and are the most difficult coins to get in the game.

Trivia

 * Red Coins opposite, Blue Coins, first appeared as the hardest-to-get coins in MatthewRPG's cancelled series I Wanna Kill The Dark One.
 * Red Coins are useless, until you get a certain amount of them.