Glimmet is a crystal plant-like Pokémon. It has a light purple body shaped like the stem of a plant, and its face is black with bright yellow eyes covered by a transparent cone. It has six dark blue crystal petals with light blues lines each around the head. The minerals inside of these petals are filled with crystallized poison.
Glimmet's diet consists of absorbing minerals from the walls of caves. Glimmet is capable of floating in order to travel. To defend itself from foes, Glimmet scatters poisonous powder from its own petals. It may have a connection to the Terastal phenomenon, though this is not confirmed; its evolution's petals resemble the Tera Jewels that are seen when a Pokémon Terastallizes, many Glimmet (along with its evolution) can also be found in Area Zero, the place where the Terastal phenomenon originated, and eight Glimmet Crystals are need to make TM171 (Tera Blast), a move that changes type with Terastalizing.
Glimmet and its evolved form may be based on a variety of animals with sessile habits, like sea anemones, crinoids, and most notably some species of sea sponge, some of which may bear resemblance to flowers, like the carnivorous demosponges of the clade cladorhizidae. It's common for sponges to use mineralized spicules and chemical deterrents as a form of defense mechanism, which may be the source of inspiration for its Toxic Debris Ability.
It may also reference copper(II) sulfate, a toxic inorganic compound taking the form of blue crystals. Its flower-like characteristics may specifically be a reference to the copper(II) sulfate hydrate chalcanthite.
Glimmet may be a combination of glimmer and the suffix -et (indicating something is small or lesser) or emit.
Kirame may be a combination of キラキラ kirakira (onomatopoeia for glittering) or 煌めく kirameku (to glitter), killer, and 芽 me (bud).