Vakishim is a kaiju from the Ultraman franchise, and this version of its cry is heard in Ultraman Mebius. The roar itself incorporates a monster sound originally from the 1957 film The Land Unknown, a piece of stock audio that was reused for decades. Many listeners recognise it from elsewhere, as the same cry was famously used for Bowser in Super Mario 64. That double life in tokusatsu and gaming helped the sound circulate online as a recognisable giant monster roar for edits and memes.