Courage Emblem

The Courage Emblem is a treasure in. It is actually a playing card of hearts. The number on it is part of the code to the safe in Hero's Hideaway, so it is randomly generated for each playthrough and is different from the number of the Love Emblem, which is also a playing card of hearts.

Collecting the treasure
The Courage Emblem is on the second step of the stepladder on the central northern spot of the Hero's Hideaway. To collect this treasure, you must command Oatchi to wait at the airstream button on the table, while you navigate through two different sets of fans, alternating the current as needed. Then, drop down one step, and throw 1 Pikmin at it. It is advised that you drop both climbing ropes before dropping down from the third and second steps.

Trivia

 * This treasure, as well as the Power Emblem and Wisdom Emblem, are not only the three treasures needed to open Olimar's bunker in the Hero's Hideaway, but also all happen to represent the three parts of the Triforce in the Legend of Zelda series: Power, Courage, and Wisdom.
 * Furthermore, Schnauz's notes suggest the heart symbol reminds him of a Heart Container from The Legend of Zelda.
 * The pairing of the Love Emblem alongside the Courage Emblem may be a reference to the Love and Courage Reactor, the Japanese version of the Courage Reactor.