� As a SwinubMamoswine's debut was in Hungry for the Good Life! as a Swinub. It appeared at Mr. Backlot's mansion from a nearby forest. It caused trouble by devouring all of Dawn's Poffins, much to the displeasure of Dawn's other Pokémon. This revealed its gluttonous nature. However, after helping take down Team Rocket and rescue the other Pokémon, Dawn decided she wanted Swinub to go with her.
While still a Swinub, it was not used very much due to its relative lack of battling experience. It had a very cheerful personality and would often jump up and down in excitement. Swinub evolved into Piloswine in Sleepless in Pre-Battle! in a battle against Team Rocket. After evolving, though Piloswine was still very affectionate towards Dawn, as seen in Get Your Rotom Running! where it tackled her to the ground out of affection.
However, its personality drastically changed. In A Breed Stampede!, just two episodes after evolving, Piloswine started to disobey Dawn. Knowing numerous powerful attacks, Piloswine felt much stronger and more confident than it did as a Swinub. It then attacked Piplup for touching its fur presumptuously. It started to develop an indifference towards Dawn and rushed towards her only after she threw its favorite food, Poffins, around, forcing it to run around to eat the Poffins. It even tried to attack Dawn with Ice Shard. It used Ice Shard and froze half the body of Grotle, who tried to stop it from rampaging. Immediately after that, it rushed all the way towards Dawn and the others, nearly crushing everyone, only to be stopped by Brock's muscular Happiny. Dawn agreed to have a battle with her Piloswine and Ash's Grotle. However, it ignored Dawn's commands and used AncientPower instead.
It later evolved again into Mamoswine after being attacked by Team Rocket. Unfortunately, it has kept its bad behavior from when it was a Piloswine, and even charged at the gang in a rage, only to be stopped by Brock, who told Dawn to return it to its Poké Ball. Despite this, Dawn is still eager to train Mamoswine well. � As a PiloswineIn battle, Mamoswine has shown to be incredibly powerful thanks to its large and powerful physique. It was shown to take Piplup's BubbleBeam, Whirlpool and Peck in quick succession with no resistance at all as well as knocking it out for the third time in A Breed Stampede!.
In Leading a Stray!, Dawn tried to call for its help removing a broken manhole cover, but it turned its back to Dawn and refused. Dawn then bribed it with Poffins in order to follow. Although it did help, it then happily threw Dawn and Piplup into the air, eating the Poffins while it was left to Happiny to catch them.
In Another One Gabites the Dust!, Mamoswine wasn't really excited to watch Dawn in the contest. Instead, it just slept with a pompom on its head. Later on, during Dawn's battle with Ursula, Mamoswine seemed to watch with interest, seeing Dawn and Pachirisu use Pachirisu's new move to the fullest.
In Trials and Adulations!, Mamoswine was injured during a battle against a wild Aggron. Dawn and her Pokémon used the first aid skills taught to her by Brock in Doc Brock! to help Mamoswine recover, and later attempted to protect Mamoswine against Team Rocket. As a result, Mamoswine started obeying Dawn and under her instructions, it was able to defeat Aggron.
In Old Rivals, New Tricks, although it pretended not to be interested, Mamoswine helped Ambipom train for the upcoming Pokémon Ping Pong Tournament. Later during the contest it tried to sleep instead of cheerleading, however when Ambipom started battling Kenny's Prinplup it started to watch and eventually got completely drawn into the excitement, watching the match wide-eyed.
In Promoting Healthy Tangrowth!, Dawn decided to train the Twin Tusk Pokémon for her upcoming Contest, all going well until Mamoswine gets embarrassed and angry over an accident and runs off into a jungle causing Dawn to go after it. Soon, a wild Tangrowth appears and attacks Mamoswine, defeating it with Tangrowth's Absorb sapping it of its energy. After learning the real reason why Tangrowth attacked, Team Rocket appears to cause havoc, it learns Hidden Power in the process of attacking Team Rocket's machine. Also during this episode, Mamoswine shows that it still has a tiny bit of a rebellious attitude, but when Dawn is in danger it does not hesitate to help her.
In Dressed for Jess Success!, Dawn used Mamoswine in the battle round of the Lilypad Contest, making it its first contest. Earlier in the episode, Dawn taught it a trick that utilizes swallowing Ice Shard to create ice spikes on its back, inspired by Ash's Grotle swallowing its own Energy Ball. Despite this, during the Contest battle against Carnivine, it lost its temper and began rampaging out of control, resulting in a loss. � Mamoswine and Cyndaquil's combinationIn DP155, Mamoswine trained with Piplup as a partner but it did not go well. The same went for Pachirisu. Dawn's Cyndaquil was the one to work well the best with Mamoswine. During their practice battle against Zoey, Zoey's Kirlia used Psychic to control her Leafeon's Magical Leaf, defeating both Mamoswine and Cyndaquil.
In DP162, Mamoswine, along with Cyndaquil, was used for the battle round of the Asatsuki Contest. The Flame-Ice combination was used by Dawn in the battle against her first foe's Houndoom and Mightyena, but it failed due to the ice melting. In the battle with Ursula, Dawn started with using both of Mamoswine and Cyndaquil's capabilities. Mamoswine swallowed Ice Shard to gain ice on its back while Cyndaquil used Swift to surround Mamoswine. Cyndaquil then turned the flame on its back on as the two charged for Ursula's Plusle and Minun. Despite Ursula losing some points, the move failed to hit the two Pokémon. After managing to work together to both attack and defend against Ursula's Pokémon's attacks, as well as mastering the Flame-Ice combo, Dawn managed to win the battle, earning her fifth ribbon.
|Using Hidden Power||Move||First used in|
|Take Down||Hungry for the Good Life!|
|Ice Shard||Hungry for the Good Life!|
|Dig||Hungry for the Good Life!|
|AncientPower||A Breed Stampede!|
|Hidden Power||Promoting Healthy Tangrowth!|
|An x shows that the move cannot be legitimately learned by this Pokémon in the games.|
|� Moves used recently are in bold unless all moves all fit this case.|
- Swallowing Ice Shard By swallowing its own Ice Shard, Mamoswine can create ice spikes on its back.
- Flame Ice is a combination which was created by Mamoswine and Cyndaquil when they were training with Dawn in DP155. It involves Cyndaquil being trapped by Mamoswine's Ice Shard while utilizing Flame Wheel.
- Sleepless in Pre-Battle, the episode in which Swinub evolves into Piloswine, first aired in Japan in the same week that Hungry For the Good Life!, the episode in which Swinub is captured, first aired in the United States. The same thing happened to Ash's Gliscor and Gligar.
- Mamoswine, as a Swinub, was the first capture Dawn made since Buizel, exactly 50 episodes before. It is also her only capture in which she didn't battle the Pokémon twice, or even at all.
- Mamoswine, as a Swinub, has some similarities with May's Munchlax: Mamoswine loves to eat mass quantities of Poffin; likewise, May's Munchlax enjoys mass quantities of Pokéblock (the Generation III counterpart of the Poffin).
- Mamoswine is similar to Ash's Charizard in several aspects. Both Pokémon began disobeyed their respective trainers after evolution, only to begin following orders after each facing another Pokémon who severely injured them. However, Mamoswine took at least 13 episodes (DP106-DP119) to start obeying Dawn, while Charizard, not counting it's time as a Charmeleon, took a full 59 episodes (EP046-EP105) to start obeying Ash once again. It was also captured in an episode featuring a character sharing an English voice actress with Liza, whom Ash left Charizard with.
- So far, Mamoswine is Dawn's only dual-type Pokémon.
- Mamoswine is Dawn's second evolved Pokémon, the first being Ambipom. Both are final forms of a Generation II evolution family. Coincidentally, both need to know a specific move to evolve.
- Mamoswine is the first Pokémon in the current saga to appear evolved in an opening prior to its actual evolution being shown.
- Both of Mamoswine's evolutions happened during a battle with Team Rocket.
- Mamoswine is similar to Ash's Gliscor in a couple of ways. Both of them were their Trainer's fifth capture in Sinnoh, and both are part of a Generation II evolution family and are both Ground types. They also sat out of exactly three Contests/Gym battles before finally participating.