Easter Eggs

An Easter Egg s is an intentional hidden message, inside joke, or feature. And within PMU there are quite a few.

Triforce
In Grassroot town, there is a Triforce, an obvious reference to The Legend of Zelda. With the Triforce, there is also the NPC, Navi, another obvious Legend of Zelda reference, specifically for the Ocarina of Time.

Cognito
A hidden area within Tanren City Plaza. The joke being, once inside Cognito, one could say, "I'm incognito", another way of saying, "I'm undercover".

Signs
There are several signs in PMU with little jokes on them.
 * Located Northwest of Snowbasin town, a sign has "Sigh...n" written on it.