Tornadus is a Legendary Pokémon from Pokémon Black and White and one of the forces of nature, a group it shares with Thundurus and Landorus (Enamorus later joined them in Pokémon Legends: Arceus). It does not evolve. Instead, the Reveal Glass switches it between its original Incarnate Forme and a Therian Forme, which was officially revealed in 2012 for Black 2 and White 2.
Both Formes are pure Flying types, but their abilities differ. Incarnate Forme has Prankster, which gives its status moves priority, with Defiant as its hidden ability, while Therian Forme has Regenerator, which restores some HP when it switches out.
Tornadus made its series debut in Stopping the Rage of Legends! Part 1. It features in Milos Island's legend, and when Ash, his friends and Lewis tried to summon Landorus, it attacked and fought Thundurus until Landorus calmed both of them in Part 2. It returned in both Formes in Unova's Survival Crisis!, where Giovanni summoned it to the Abyssal Ruins and set it rampaging with Thundurus and Landorus until Meloetta freed the trio.
Tornadus arrived in English in Emerging Powers (2011) as a Colorless Basic, printed both as a holo Rare and as a full-art Ultra Rare, both by 5ban Graphics. A Forces of Nature Collection promo reused its Japanese Battle Gift Set art. Tornadus-EX followed in Dark Explorers (2012) and again in Plasma Freeze (2013), each set pairing a regular EX with a full-art version by 5ban Graphics, and a Tornadus-EX by Ryo Ueda was the Legendary Treasures prerelease promo.
Tornadus GX came as an SM Black Star Promo in the Forces of Nature GX Premium Collection. Chilling Reign (2021) printed Tornadus V, including a full art by PLANETA Mochizuki and a second Ultra Rare with different artwork by tetsuya koizumi, plus Tornadus VMAX by Mitsuhiro Arita as a holo card and a Secret Rare. Its later printings have been regular Rares, Uncommons and promos.
The full-art Ultra Rare from Tornadus's first English set, illustrated by 5ban Graphics.
The full-art version of Tornadus's first EX card, illustrated by 5ban Graphics.
The Legendary Treasures prerelease promo, illustrated by Ryo Ueda.
Tornadus's only GX card, a promo from the Forces of Nature GX Premium Collection.
An Ultra Rare Tornadus V with artwork by tetsuya koizumi.
The Secret Rare version of Tornadus VMAX, illustrated by Mitsuhiro Arita.
Tornadus first appeared in English in Emerging Powers (2011), as a holo Rare and a full-art Ultra Rare illustrated by 5ban Graphics.
Both are pure Flying types. The Reveal Glass switches between them, and Therian Forme trades Incarnate Forme's Prankster and Defiant for Regenerator.
A group of Legendary Pokémon made up of Tornadus, Thundurus and Landorus from Generation 5, later joined by Enamorus. Each has an Incarnate Forme and a Therian Forme.

トルネロス
Flying
Tornadus is the Cyclone Pokémon, a Legendary pure Flying type from Generation 5 and one of the forces of nature with Thundurus and Landorus. The Reveal Glass turns its Incarnate Forme into Therian Forme, and on cards it has carried EX, GX, V and VMAX versions.