Pikmin (Animal Crossing series)
In animal crossing, there is an item that you can place in your house called pikmin. This item looks like a flower pot with 3 Pikmin in it, a yellow pikmin, red pikmin and a blue pikmin. When clicked on, you hear the sound that is made on the "nintendo" part of Pikmin 2.
 Mushroom Paper
In Animal Crossing: Wild World there is some stationary called "Mushroom paper" that has a background that looks like the Common Glowcaps from Pikmin and Pikmin 2. It has a dark background, just like inside the Forest Navel.