In 2011 movie called Scooby-Doo! Legend of the Phantosaur there is a scene where, under the influence of hypnosis, Shaggy beats up an entire biker gang .on Oct. 8, 2017 YouTube user Midya post this clip with the Ultra Instinct music from Dragon Ball Super. This is the theme that plays when Goku first reached Ultra Instinct form in the episode “Son Goku Wakes! New Level of the Awakened!!,”.
The concept of Shaggy being a super powerful character in the Dragon Ball universe continued to tickle the internet’s fancy and for the rest of 2017 and into 2018, certain online pockets continued to make edits, art, and videos of Ultra Instinct Shaggy. While there’s no shortage of Ultra Instinct Shaggy posts out there, none of them reached the virality of the current Shaggy memes. Still, the idea of Shaggy as an all-powerful being started to lodge itself into the minds of deep internet denizens.