What is Buneary Madness?
Buneary Madness was a special Easter event, first introduced in Easter of 2011. The purpose of the challenge is to capture as many escaped Buneary as possible at the end of the time limit. This event lasts for the entirety of Easter weekend from 12am Saturday to 12am Monday.
Buneary Madness was not held in 2013, and has not been held since 2014.
It was replaced by the Swarming Bunnelby event in 2017.
During the event, escaped Buneary randomly appear on pages of the RPG. If you spot one, you can click the image. A page appears with a captcha code. After entering the correct code, the Buneary is logged as being caught by you. Rankings can be checked along with the number of Buneary logged under the Buneary Madness tab in Challenges.
The Buneary will look like this: 
Prizes are distributed based on the rankings at 12am on Monday.
For Easter 2012, the grand prize was a Normal/Shiny/Dark/Golden Golett for the person who collects the most Buneary. The runners-up until rank 10 each received a Normal/Shiny/Dark Golett. Every person that logged at least one Buneary received a Golett.
Prince of Persia for writing the article.
I Am Legend for the image.