Audino's ear feelers work like stethoscopes, letting it feel another Pokémon's heartbeat to assess its condition and detect when an Egg is close to hatching. It can Mega Evolve into Mega Audino using an Audinite introduced in Pokémon Omega Ruby and Alpha Sapphire; the Mega Evolution gives it a flared, coat-like pattern and upright, curlier ear feelers, and prior to Pokémon Legends: Z-A it was the only Generation V Pokémon capable of Mega Evolving. Audino turns up in every patch of rustling grass in Black and White, and its high Exp. yield makes battling it a quick way to level up.
Audino appeared in Dreams by the Yard Full!, where Cilan explained that Unova's Nurse Joys use Audino instead of Chansey as hospital partners. A Nurse Joy from Kalos owned an Audino capable of Mega Evolving in A Giga Battle with Mega Results!, much of the episode following her search for an Audinite. In Where Did You Go, Audino?, five people's Audino, including Mimi's, went missing after Team Rocket's interference.
Audino was designed by Saya Tsuruta with Pokémon the Series: Black & White in mind, intended as a nurse figure to replace Chansey in Unova; its rabbit-like features and stethoscope-like ear feelers reinforce that medical role. Its first card is a 2011 Black & White Uncommon illustrated by MAHOU, and Tsuruta herself illustrated its Black Bolt common. Fates Collide later added both an Audino EX and an M Audino EX Ultra Rare, and the Mega Evolution era's Ascended Heroes brought a Mega Audino ex in both Double Rare and Ultra Rare forms.
Audino's earliest card, a 2011 Black & White Uncommon illustrated by MAHOU.
A Fates Collide Audino EX Ultra Rare illustrated by Ayaka Yoshida.
A Fates Collide M Audino EX Ultra Rare illustrated by 5ban Graphics.
An Ascended Heroes Mega Audino ex Double Rare illustrated by 5ban Graphics.
An Ascended Heroes Mega Audino ex Ultra Rare illustrated by 5ban Graphics.
Nurse Joys there use Audino instead of Chansey as hospital partners.
With an Audinite, introduced in Pokémon Omega Ruby and Alpha Sapphire.
Saya Tsuruta, with Pokémon the Series: Black & White specifically in mind.

タブンネ
Normal
Audino is the Hearing Pokémon, a Normal type whose ear feelers act like stethoscopes, and it can Mega Evolve using an Audinite introduced in Pokémon Omega Ruby and Alpha Sapphire. In the anime, Unova's Nurse Joys work with Audino instead of Chansey, and our catalog lists 18 Audino cards across 14 sets.