Gooigi first appeared in the Nintendo 3DS remake of Luigi's Mansion and later became a breakout star in Luigi's Mansion 3 for the Nintendo Switch. Created by Professor E. Gadd from a combination of ghost energy and coffee, this lime-green clone serves as a secondary player who can slip through grates but dissolves instantly in water. In internet culture, Gooigi has become a symbol for fragility, social anxiety, and 'beta' energy, often used to depict situations where someone feels like a lower-resolution, melting version of themselves. His blank stare and wobbly physics make him the perfect subject for memes about being overwhelmed or simply existing in a semi-solid state.