I decided to draw them, so I'll probably at least draw the original three colors...I started with Yellow, they're my favorite...I think its the ears. XD
Pikmin expressions are next to impossible to do beyond the eyes, but I tried to make her as happy looking as possible.
I wasn't really sure what to do woth the background, so its just a bunch of random gradients using the three main colors from the Pikmin herself.
I was also partly inspired to draw the Yellow Pikmin because of this: [link]
And I'm referring to this Pikmin as a female, because the lead singer of Strawberry Flower (the virtual band that did "Ai No Uta") is a Yellow Pikmin, according to Wikipedia. [link]