Having run off from the lab in a dispute with Chimchar, Dawn finds Piplup trapped in a web and helps it out. Piplup & Dawn grew a close bond very quickly. Piplup can be described as a brat, but it truely tries its best in battles, despite the fact that its not the most powerful Pokémon. Dawn tends to let Piplup stay out of its Pokéball but does keep it in sometimes

Obtained in episode: Following a Maiden Voyage!

After having various Buneary attack her during her travels, Dawn came across another Buneary. Eager to add it to her team, she attempts to battle it and eventually succeeds and captures it. Buneary is female and appears to have a crush on Ash's Pikachu and knows many poweful attacks including Ice Beam

Obtained in episode: Setting the World on its Buneary!

During her travels, Dawn met up with a hyper Pachirisu. After several problems between Pachirisu and the group, Dawn eventually befriended the cute little squirrel. It is a loving Pokémon, that is known to shock Dawn whenever it is happy, causing Dawn a Bad Hair Day. However, it has some powerful attacks including Spark so it is able to hold its own in battle.

Obtained in episode: Twice Smitten, Once Shy!

After evolving from Piloswine, Mamoswine seems to be even more hot-headed and immediately charged at Ash & Co.. With its powerful attacks such as AncientPower and Ice Shard, Mamoswine is the major massive powerhouse of Dawn's team. After it evolved, it had trouble obeying Dawn until Dawn managed to convince it to obey when she took care of it when it was injured. When it's not in battle, it has a habit of sleeping.

Evolved from Piloswine in episode: A Breed Stampede

After allowing a princess called Salvia to take her place in a Pokémon Contest, Salvia was kind enough to allow Dawn to have her Togekiss so that Togekiss can partake in Pokémon Contests, which Salvia herself is unable to do. Togekiss has many powerful attacks such as Aura Sphere that allow it to be able to be able to hold its own in battles as well as create dazzling appeals.

Given by Salvia in episode: Dawn of a Royal Day

While Dawn was helping Professor Rowan to get some runaway Pokémon back, Dawn & her Pokémon got captured by a swarm of Ariados. In order to help, Cyndaquil evolved into Quilava and managed to use its massively powerful attacks such as Eruption to defeat the Ariados and protect its trainer.

Evolved from Cyndaquil in episode: Dawn's New Journey

After receiving the egg from Kotone in the Johto Festival, the egg quickly hatches into a Cyndaquil. Cyndaquil is clingy of Dawn and was constantly fighting with Piplup for her attention. It has some powerful attacks at its disposal including Flame Wheel, Swift and Smokescreen which will sure help it become a vital part of Dawn's team. It managed to show its strengths well in the Sinnoh Grand Festival and eventually evolved while protecting Dawn against some Ariados

Hatched from Egg in episode: An Egg Scramble
Evolved into Quilava in episode: Dawn's New Journey

Before evolving, Ambipom was originally Ash's Pokémon. However, since Ash met it, it has loved the idea of contests and not battling and was eventually traded to Dawn and evolved soon afterwards. Through the training it received form Ash when it was an Aipom, Ambipom is one of the major powerhouses of Dawn's team, and with this and its love for Contests, it is likely to be used many times in Dawn's campaigns. After partaking in a Pokémon Ping-Pong Tournement, it learned it's true calling and after much consideration, decided to leave Dawn & Ash and stay training in Ping-Pong

Evolved from Aipom in episode: Journey To The Unown
Left with O in episode: To Thine Own Pokemon Be True!

After evolving from Swinub, Piloswine changed personality drastically. Now with a much stronger range of attacks, Piloswine feels its strengths outweigh Dawns and as such it no longer obeys her completely. However, while training in the Friendship School, it learned Ancientpower and evolved in battle

Evolved from Swinub in episode: Sleepless in Pre-Battle
Evolved into Mamoswine in episode: A Breed Stampede

Dawn met Swinub when in Mr. Backlot's garden. Swinub immediately came and ate all the Poffin that Ash & Dawn had made. Despite this, Dawn decided that Swinub should join her after she saw it defeat Team Rocket with relative ease. As such, Swinub is a very quick and hungry Pokémon knowing some powerful attacks including Take Down. It later evolved into Piloswine and had a massive change in personality

Captured in episode: Hungry For the Good Life!
Evolved into Piloswine in episode: Sleepless in Pre-Battle

Aipom was originally Ash's Pokémon. However, since Ash met it, Aipom has loved the idea of contests and not battling and was eventually traded to Dawn. Not long after being traded, it evolved into Ambipom during a battle in the Solaceon Ruins

Traded to by Ash in episode: Throwing A Track Switch
Evolved into Ambipom in episode: Unown of Solaceon Ruins

After hooking it while fishing, the strong Buizel managed to take out Pikachu, Piplup & Zoey's Glameow. This made all three want to get it. After rescuing it from Team Rocket, Buizel allowed Dawn to battle it in order to capture it, which she did. Buizel is a rather strong & arroagnt Pokémon, the strength of her team. However, due to its arrogance, it is not above disobeying orders. Buizel was more into battling than contests. This led Zoey to ask Dawn if it was right to be in her team. After a trial, Dawn decided to trade Buizel for Ash's Aipom

Obtained in episode: Buizel Your Way Outta This! Traded to Ash in episode: Aipom & Buizel! Respective Roads!