Great Fury of Aengus (usually simply called Aengus) from my PKMNation Ranch! For those who are particularly savvy when it comes to mythology and/or legendary swords, you're right! He's named after Irish mythological figure Aengus' sword, Moralltach, also known as the "Great Fury".

Art (c) galacticpink
PKMNation (c) http://pkmnation.deviantart.com
Pokemon (c) Nintendo