Eye Tutorial: [link]
Pen Tutorial: [link]
Color Guides: [link]
Original Screenshot: [link]
Final Vector: [link]
A speed draw of this pony: [link]
Inkscape tutorial for those of you who don't have Illustrator: [link]
Hope this helps people make pony vectors using the greatest vector program! If you are confused about anything at all, feel free to ask. There are no stupid questions.
Suggestions to help me improve this tutorial are of course welcome.Update 2/24/12:
Added a section for non-CS5 users.Update 2/25/12:
Clarified section on one-sided width changing.FOR USERS OF PRE-CS4 VERSIONS OF ILLUSTRATOR: This tutorial
goes more in-depth into the stroke-to-fill method of line adjustment. It also showcases a slightly different method for vectoring, so you might want to check it out.