Ash's Scraggy

Ash's Scraggy is the fifth Pokémon to be obtained by Ash during his travels in Unova

Biography
In BW012, as a parting gift from the Day Care Owner, Ash was given a Pokémon egg. It later hatched into a Scraggy in BW017, after Iris' Axew accidently knocked its egg down a hill. Scraggy was shown to be very aggressive, headbutting the gang's Pokémon when they were called out to greet him. However, his attacks were not very strong, due to the fact that he was newly hatched.

Later on, Scraggy wandered off and began Headbutting a tree, which turned out to be home to several wil Galvantula. He was quickly paralyzed by the Galvantula. With no Pokémon Centers nearby, Iris made a herbal remedy in order to cure the paralysis.

The following day, Scraggy went to get revenge on the Galvantula, but was outmatched by them and was rescued by Ash and his other Pokémon. Seeing their act of heroics, Scraggy began to trust his teamates and his new Trainer.

Shortly after, Cilan suggested that Scraggy battle Axew, as they were both equals in terms of strength. The battle ended when both Pokémon were knocked out. After the battle, Scraggy happily went into its Pokéball. Scraggy and Axew had a second battle in BW020, which ended after Axew attempted (and failed) to use Dragon Rage.

Trivia

 * Scraggy is Ash's very first Dark-type Pokémon.
 * Scraggy is Ash's fourth Fighting-type Pokemon and his third to have a dual type.
 * Scraggy is also Ash's second Fighting pokemon that wouldn't obey Ash right away.
 * It seems that headbutting is a gesture of greeting for it.
 * Ash's Scraggy seems to have a bit of friendly rivalry with Iris's Axew.
 * Due to the japanese event it hints Scraggy knows or will learn low kick and high jump kick