"As a result of storing too much electricity, it developed patches where even downy wool won’t grow."
While Mareep was a pure sheep, Flaaffy proves that evolution diverges greatly from the real world animal. Mainly in that Flaaffy can stand on two legs. This gives it actually better stats and potential for attack movies. Why does it turn punk though? The world may never know.
Flaaffy's Basic Attacks are Tackle and Charge Beam, while its Special Attacks are Thunderbolt, Power Gem, and Discharge.