Bullfrag is the Omnitrix's DNA sample of an Incursean from an unknown and destroyed planet.

Bullfrag is a humanoid frog-like alien with three-fingered hands and two-toed feet. He is, however, considerably taller, more muscular and paler-skinned than a typical Incursean and has a more defined jawline.

In The Frogs of War: Part 2, Bullfrag first wore a typical black-and-purple Incursean uniform as a disguise. He also wore an Incursean helmet and purple sunglasses.

As of Bengeance is Mine, Bullfrag wears green sunglasses, a black bodysuit with a green stripe down the middle, fingerless black gloves, toeless black boots with green cuffs above them, and a green belt with a white buckle.

Bullfrag wears the Omnitrix symbol on his upper chest, which was hidden under his suit during The Frogs of War: Part 2.

Bullfrag has powerful jumping abilities and is very agile, much like an ordinary Earth frog.

Bullfrag has impressive hand-to-hand combat abilities, as he was able to take down Empress Attea and a squadron of average Incurseans[2] and hold his own against a mob of Squid Monsters.[1]

Bullfrag's physique makes him stronger than an average Incursean, he was able to carry Bill Gacks in the air without any difficulty.[1]

Bullfrag is more durable than other Incurseans, as he can endure being kicked by a Tetramand.[3]

Bullfrag possesses a long, sticky and prehensile tongue, which he can use as a grappling line or to hit a distant target. It is also very strong, as it can smash boxes.[3] Its tensile strength is high enough to slow down the Billions Tower sign to a near standstill after falling from the top of a skyscraper.[4]

Bullfrag can inflate his chest to repel enemies and gain momentum to jump.[1]

Bullfrag is capable of withstanding the vacuum of space for a limited amount of time, as demonstrated by Empress Attea.[5]

Bullfrag can hold his breath underwater for four to seven hours thanks to his respirators.[DJW 1]