Mini Bowser (toy)
From the Super Mario Wiki
Mini Bowser is a new wind-up toy that makes his debut in Mini Mario & Friends: amiibo Challenge. Mini Bowser is unlocked via a Bowser amiibo. He shows an unique special ability that other minis don't have. Any time Mini Bowser steps on rocky blocks, he can Ground Pound to break them and get access into lower levels of a stage. He is voiced by Kenny James and sounds similar to Bowser, but higher-pitched.