Lizardon

Charizard is a draconic, bipedal Pokémon. It is primarily orange with a cream underside from the chest to the tip of its tail. It has a long neck, small blue eyes, slightly raised nostrils, and two horn-like structures protruding from the back of its rectangular head. Two fangs are visible in its upper jaw when its mouth is closed. Two large wings with blue-green undersides sprout from its back, and a horn-like appendage juts out from the top of the third joint of each wing. A single wing finger is visible through the center of each wing membrane. Charizard's arms are short and skinny compared to its robust belly, and each limb has three white claws. In Pokémon Red and Green, Charizard is seemingly shown holding a fireball, implying that it's capable of manipulating its flames using its hands; this is seen in media where it uses Fire Punch. It has stocky legs with cream-colored soles on each of its plantigrade feet. The tip of its long, tapering tail burns with a sizable flame, which can intensify to a blue flame if Charizard is irritated.

Charizard typically inhabits mountains and valleys, such as the Charicific Valley in Johto. However, Charizard can also live in volcanoes, forming packs with other members of its family, including Charmander. In Pokémon Snap, it's shown that Charizard are fully capable of living inside lava within volcanic craters.

Charizard flies in search of powerful opponents to battle, and its fire will burn hotter as it gains experience. Its fiery breath can melt boulders and massive glaciers and has been known to cause forest fires accidentally. Though its fiery breath is hot, it never turns it on any opponent weaker than itself. The Pokémon the Series: Gold and Silver episode Charizard's Burning Ambitions (EP136) showed that only a weak Charizard would show off its power. The side story episode Those Darn Electabuzz! (HS15) showed that Charizard can swim underwater, with Pokémon Origins further showing that the flame on the tip of the tail can still keep burning underwater. Charizard's wings can carry it to an altitude of 4,600 feet (1,400 meters), but An Illustrated Book of POCKET MONSTERS notes that its droppings were found on Mt. Fuji, implying it could fly thrice as high. In Pokémon Sleep, as well as media like the animated series, Charizard is known to sleep in an incredibly relaxed position, as it is very confident in its power. It has three different sleep styles: Stomach Sleep (also used for Atop-Belly Sleep), Tummy-Rub Sleep, and Tummy-Up Sleep - the last of which has Charizard sleeping flat on its back, which may be an indicator of that Charizard being especially strong. In the animated series, it was shown that Charizard may be vulnerable to their tail flame going out in the same way as Charmander, according to the Pokémon the Series: The Beginning episode Charizard Chills (EP107), where Ash warns his Charizard to not let its flame go out.

Even though Charizard originally couldn't learn the move Fly, Trainers have been shown riding Charizard in official artwork dating back to the 1997 Carddass Trading Cards. Ash himself was shown riding his Charizard already in the second season of the original series of Pokémon the Series. Eventually, in Pokémon Yellow, Charizard became able to learn Fly and has since been frequently depicted as a Pokémon able to carry people on its back to fly them to distant areas. In Alola, Charizard is a Ride Pokémon called Charizard Glide, being used by the natives to fly around the region or make deliveries.

Forms
Charizard has three alternate forms: Mega Charizard X, Mega Charizard Y, and Gigantamax Charizard.

Both of Charizard's Mega Evolutions feature a shorter snout, white, vertical slit pupils, and a bright underside reaching the lower jaw.

Mega Charizard X
As Mega Charizard X, its body and legs are more physically fit, though its arms remain thin. Its skin turns black with a sky-blue underside and soles. Two spikes with blue tips curve upward from the front and back of each shoulder, while the tips of its horns sharpen, turn blue, and curve slightly upward. Its brow and claws are larger, and its eyes are now red. It has two small, fin-like spikes under each horn and two more down its lower neck. The finger disappears from the wing membrane, and the lower edges are divided into large, rounded points. The third joint of each wing-arm is adorned with a claw-like spike. Mega Charizard X breathes blue flames out the sides of its mouth, and the flame on its tail now burns blue consistently. It is said that its new power turns it black and creates more intense flames.

Mega Charizard Y
As Mega Charizard Y, it becomes sleeker in appearance but retains its normal coloration. It has three pointed horns on the back of its head, the middle of which is longer. Its snout has larger fangs and a ridge on the nose. Its neck is shorter, but its torso is thinner and longer. It features longer digitigrade feet. Its hands are less developed, with extremely shortened fingers that are no longer separated from each other. Small wings develop on its wrists, while the ones on its back become larger, lose the wing finger passing through their membrane and end up with ragged edges. The back of its tail has a large spike at the base and three smaller ones near the tip, which now burns with a longer flame. Mega Charizard Y is said to have incredible flying prowess that is greater than a jet fighter.

Gigantamax Charizard
As Gigantamax Charizard, it becomes larger and more physically fit. The lower part of its body glows white, with several yellow diamonds on the lower belly. There are also diamond-shaped spots located on the front legs. The claws located on its hands and feet become longer and sharper. The feet become longer and digitigrade, retaining small glowing soles under the forefeet. The sclerae of the eyes become yellow. The glow of a flame can be seen in the mouth, and the teeth grow, with the lower front teeth and three teeth in the middle now protruding when the mouth is closed. The flame on the tail extends out and has three red clouds surrounding it, like the clouds most other Gigantamax Pokémon have. Two flames sprout from its horns, and its wings are transformed into literal flame wings extending to the shoulder blade.

Due to being enhanced by Gigantamax energy, the fire within Charizard's body has become much stronger, burning hotter than 3,600 degrees Fahrenheit (2,000 degrees Celsius) and continuing to rise in temperature when Gigantamax Charizard roars. When using its signature G-Max Move, G-Max Wildfire, it launches its colossal fiery wings in the shape of a bird, which circles opponents while continuously scorching them with flames even hotter than magma.

Evolution
Charizard evolves from and is the final form of .

(Source: Bulbapedia)