Donkey was a mascot of the Listerine adverts. He made his debut in September 2020 was removed in 2025.
Donkey is Scottish, and he always keeps his teeth sparkling clean, and helps people from the UK to help people use Listerine more, in order to kill 97% of the germs left behind during brushing.
His catchphrase is Complete The Clean, with Listerine, which was the brand slogan at the time.