Regitube is a surreal offshoot of the Pokémon 'Regi' fandom, primarily centered around the legendary ice-type Regice and its robotic, synthesized vocalizations. The meme gained traction within shitposting communities for its absurd visual of a cylindrical or 'tube-ified' Regice, often accompanied by the onomatopoeia 'ÜN ÜN ÜN' representing its cry from the anime. It is frequently used in 'brain rot' humor and rhythmic video edits where the Regitube's movements sync with distorted bass or electronic music. Users utilize the template to express robotic indifference, chaotic excitement, or simply to participate in the abstract humor that defines modern Pokémon internet culture.