Donphan was received as an egg in Extreme Pokémon after Ash and Bayleef won a race held by an old couple who bred and cared for numerous Pokémon eggs.
The egg later hatched into Donphan as a Phanpy in Hacthing A Plan and was a playful Pokémon yet refused to obey Ash's commands. Unfortunately, things took a turn for the worst when Team Rocket arrived to capture Phanpy. In the process, Phanpy was shocked by Pikachu's Thunderbolt attack despite Ground-types being immune to every kind of Electric attack. Despite this, its trust for Ash was destroyed and the second it got hit and heartbroken, it ran away, leaving Ash, Brock, Misty and Pikachu searching for it.
Phanpy fell into Team Rocket's clutches who manipulated the little baby Pokémon into thinking they actually cared for it but once Pikachu had been captured, Team Rocket showed their true colors and dumped Phanpy in the cage with Pikachu.
Luckily, though, Pikachu, having seen through Team Rocket's scheme hatched an escape plan and the two managed to get away although Phanpy was swept away after falling into a river. Ash saved the little Pokémon and regained its trust for him, realizing that he cared more about its well-being than Team Rocket ever would. Phanpy later grew to resent Team Rocket and used Rollout to weaken the enemy's Pokémon before Pikachu used Thunderbolt to send the bad guys blasting off again. After that, Phanpy and Ash formed a strong bond that continues to this day.
Phanpy was unable to replicate this success in the next episode where Team Rocket used their new Delibird who launched a Blizzard which managed to knock out Phanpy in a single blow due to the fact that Ground-type Pokémon are weak against Ice-type attacks.
In As Cold as Pryce, Ash, arrogantly misjudged the situation and sent Phanpy out to fight Pryce's Dewgong but due to Dewgong holding the type advantage, Phanpy lost and was encased in ice as a result.
Ruby and Sapphire
In Reversing the Charges, Phanpy solely fought against Team Rocket and one of their many mecha machines but could not beat it. However, just when it looked hopeless, Phanpy evolved into Donphan and learned Hyper Beam before using it to defeat Team Rocket.
Ash used Donphan in the battle against Pike Queen Lucy and defeated her Seviper, before getting knocked out by her Milotic.
Ash uses Donphan to team up w/Brock's Steelix battling against Charizard & Aggron until everyone found out Team Rocket were shown stealing the Poke Balls.
Diamond and Pearl
Donphan did some training for the Sinnoh League w/Ash's other Pokémon.
Donphan returned to Ash in the Sinnoh League where it lost to Conway's Dusknoir.
Donphan is set to appear in Pokémon Journeys: The Series.
Voice actresses and actor
- Megumi Hayashibara (Japanese as a Phanpy)
- Tara Sands (English 4Kids dubbed as a Phanpy)
- Lindsey Warner (English 4kids dubbed as a Phanpy)
- Kayzie Rogers (English PUSA dubbed as a Phanpy)
- Kenta Miyake (Japanese and English as a Donphan)
- As a Phanpy, Donphan was voiced by Megumi Hayashibara in the Japanese version of the anime while in the English-language version, four different voice actors Tara Jayne, Lindsey Warner, Michele Knotz, Jamie Peacock- (Kayzie Rogers' alias) provided vocals for Phanpy. Upon its evolution into Donphan, Kenta Miyake who plays Giovanni in the Japanese version of the series took over the voice duties for Donphan in both the Japanese and English-language versions.
- Donphan is Ash's first Ground-type Pokémon, as well as his only one to be a pure Ground-type.
- It is the first Pokémon Ash hatched from an egg.
At Oak's Lab
At Kukui's house
At Cerise Laboratory