Dragon Wario

From the Super Mario Wiki

Dragon Wario is one many forms in the Wario Land series.

It first appeared in Super Mario Land 3: Wario Land, where it could be activated by touching a Dragon Pot. Instead of getting a hat, he gets a seemingly mechanical dragon on his head. Then he can breathe fire, but it only lasts a few seconds. It works underwater too.

The next time Wario could get these powers was in Virtual Boy Wario Land by obtaining the Dragon Hat. This game differed in that he couldn't bash things with his shoulder as a dragon.

It also appears in Wario: Master of Disguise and works similarly, although it can be used throughout a level. Dragon Wario falls through thin floors in Wario: Master of Disguise, assumedly because he is very heavy in this form, as evidenced by the fact that he can't jump very high. Unlike in Wario Land, this form does not work underwater. Also he can swim in lava and can have blue fire if he gains a mastery gem. Dragon Wario somewhat resembles a Kritter in this game.

Wario's Disguises in Wario: Master of Disguise
Thief Wario | Cosmic Wario | Arty Wario | Genius Wario | Sparky Wario | Captain Wario | Dragon Wario | Wicked Wario

Fire Creatures
Angry Sun | Blargg | Bomb | Burn Bit | Crusher Blargg | Czar Dragon | Ember | Fiery Bubble | Fire Chomp | Fire Elemental Ghost | Fire Snake | Fireball | Fryguy | Fryguys | Gargantua Blargg | Helio | Hot Foot | Hot Lips | Hothead | Kleever | Lava Bubble | Lava Bud | Lava Drop | Lava Ghost | Lava Piranha | Li'l Sparky | Mini Fryguy | Petit Piranha | Phantom Ember | Podoboo | Pyro Guy | Pyrosphere | Sparky | Sun | Torcher | Trouble Bug
Fire-Related Creatures
Baby Bowser | Birdo | Bowser | Bowser Jr. | Calm Volcano Plant | Dhalsim | Dino-Torch | Dragon Wario | Fire Bro. | Fire God (Mario & Luigi: Superstar Saga) | Fire God (The Super Mario Bros. Super Show!) | Fire Luigi | Fire Mario | Fire Wario | Flaming Wario | Flare | Gao | Iggy Koopa | Jumping Piranha Plant | Kerozene | King Totomesu | Lava Lotus | Ludwig von Koopa | Sumo Bro. | Tryclyde | Venus Fire Trap | Vivian | Volcannon | Volcano Lotus | Zeus Guy (Bandit) | Zeus Guy (Snifit)