Ash's Snivy

Ash's Snivy is the fourth Pokémon that Ash obtained in Unova.

Biography
Snivy first appeared in BW007: Snivy Plays Hard to Catch!, where it was caught by Ash and the gang stealing food from them. Iris and Cilan believe that she deemed her Trainer unworthy of her and so abandoned them, after they witnessed her high-level attacks.

Ash chased after Snivy throughout all of the episode, using each member of his team in turn to battle her, however the majority of his team (Pikachu, Oshawott and Tepig) were affected by Snivy's Attract, forcing Ash to recall each of them. It wasn't until Pidove offered to battle did Ash manage to defeat Snivy, as her Attract had no effect on Pidove (due to her also being female). Eventually, Snivy conceeded defeat and allowed Ash to catch her.

She was sent out twice during Ash's five-on-five battle with Trip. She first battled Trip's Servine and won with the help of her Attract. She then battled Trip's Frillish. Ash had no knowledge of Frillish's Cursed Body ability, so commanded Snivy to use physical attacks, which led to their loss.

In BW028, she battled against Bianca's Pignite after Iris' Emolga summoned it using Volt Switch. It later develops a rivalry with Emolga, as she is unimpressed with Emolga's attitude. It continuously uses Vine Whip to bring Emolga back after she tries to escape and also when Snivy showed the gang who had caused the fight between Ash's Pokmon. However, despite this, Snivy saved Emolga (as well as Axew and Oshawott) from a wild Simisear. Their rivalry was put on hold when Snivy and Emolga worked together to destroy a boulder that was about to crush the Simisear. However, the rivalry did not disappear, as shown when Snivy and Emolga looked quickly away from each other in disgust after catching each others' eye.

Trivia

 * Snivy seems to be the most level headed and mature Pokemon currently on Ash's team.
 * It is suggested that Snivy is one of the few Snivy's who abandoned their previous trainers since they saw the trainer as unworthy or incompetent. Which could explain her high level grass moves and Attract, although it may be possible Snivy was strong before all this.
 * During Ash and Snivy's first encounter, Snivy displayed surprise at how Ash protected Pikachu and even thought about it a little. This could possibly mean Snivy had some troubled relation with a previous trainer.
 * Snivy was the only Pokemon on Ash's team to ever defeat Trip's Servine. After Pikachu fell to it, Snivy was able to defeat it. She later fell to Trip's Frillish.
 * She may have traits similar to Ash's Grass starters: being a prime battler as in Ash's Sceptile, being a protector as in Ash's Bulbasaur, if counted being a female Grass-type as in Ash's Bayleef and taking charge as in Ash's Torterra when it was Turtwig.
 * Snivy is Ash's fifth pokemon to battle its evolved form. The other four were Pikachu, Treeko, Buizel, and Gligar.
 * However, only Snivy, Pikachu, and Buizel defeated their evolved forms.
 * Snivy is Ash's second confirmed female Grass-type starter (the first being Bayleef).
 * But the only one that does not show any over affection.
 * Snivy is Ash's only pokemon to know the move Attract.
 * All of Snivy's Grass-type moves are also known by Ash's other Grass-type Starters.
 * Vine Whip is also known by Bulbasaur and Bayleef.
 * Leaf Storm is also known by Sceptile and Torterra.
 * Leaf Blade is also known by Sceptile.