[WIP] Birdo sprite

Hello and thanks both for the advices.
Regarding the color, the tricky thing is that my PC's screen displays the purples more magenta-ish than my smartphone where the purples are more blue-ish. So, I replaced that magenta by a more pink color.

Here's the updated sprite :


By the way, if you have some times, I updated my Yoshi and Toad sprites in the corresponding topics and I'm waiting to know if there is some more modifications to do on them.