Terastallization is the signature battle mechanic introduced in Pokémon Scarlet and Violet in 2022, which allows Pokémon to take on a jewel-like appearance and potentially change their elemental type. In the meme world, this mechanic is used to represent a dramatic transformation, a massive power-up, or a sudden change in personality. Often depicted with a glowing crystal hat or crown, the meme parodies how any ordinary person or object can become 'fabulous' or strategically superior. It has become a staple in the Pokémon community to describe characters 'Terastallizing' into something unexpected, highlighting the absurdity of the crystal designs and the tactical shifts they represent.