The Mentor badge was changed sometime in January of 2009, I believe. The change was made in order to improve the design.
Yes, the WikiAnswers mentor badge design was slightly changed due to feedback from a contributor.
No.
You will receive a Gold Contributor badge when you reach 25,000 contributions! However, this formula may change in the future to emphasize answering more.
There are three: Protege, Mentor, and Senior Mentor.
you do not make them , you earn them.
No there is not.
Green Thumb.
15 and up to be a Mentor. Note: usually teens become Teen Mentors.
Community Assistant is a hard badge to earn but the hardest would depend on your interests. To be a Community Assistant, you must work for WikiAnswers (Real Job) Otherwise, the Ruby Contributor badge is really hard to achieve.
One becomes a senior mentor with time and mentoring a new mentor and protege, but will be asked at the proper time.
Well, Chris Whitten was the founder of answers.com so unofficially he was the first mentor. But, Officially Deb was the first Mentor.
There is no badge titled "Flair Badge" but there were some badges made that could be considered flair. Check out the related links.