Hidden mural

Throughout there are hidden murals – these are fifteen small abstract drawings of Pikmin doing various tasks. They are normally found in dark or not-so-obvious locations, and most of the time are too small to see clearly, so to view them with detail, the KopPad's camera feature is necessary. The origin of these murals is currently unknown, and it is not clear if these are rock paintings or if they are engravings, known as s. Each area in story mode has three drawings. Each area contains drawings of only one Pikmin type, usually the Pikmin type found in that area, and each of the markings there represents that Pikmin in a different maturity.

In Pikmin 3, these drawings are simply Easter eggs with no in-game reward for finding them, but in, their existence is acknowledged by Olimar, and taking photos of the murals with the KopPad's camera earns the player badges.

Twilight River
Besides these drawings, there is also a hidden carving of sorts in this area.

Badges
In, there are two badges the player can gain from taking photos of the hidden murals:
 * Archaeology Hobbyist: Taking photos of five hidden murals.
 * Legendary Archaeologist: Taking photos of all fifteen hidden murals.

Other drawings
In the Twilight River, there is a carving of sorts of three Yellow Pikmin holding hands, not unlike the drawing at the Distant Tundra. It can be found at the base of the light-bulb in the Twilight River's cave, facing the water. This does not count as a hidden mural, despite the similarities.

In addition, in most gates have some feature on them to help distinguish between them. Dirt walls have simple line designs drawn on them, and reinforced walls have drawings in a similar style to the hidden murals.