Name: Bart Allen

Justice League Code Name: “Impulse”

Family:

• Unknown

Occupation:

• Courier, Justice League

Powers & Abilities:

• Super speed
• Super stamina

Vulnerabilities:

Although Bart can run at incredible speeds, he isn’t invincible as he doesn’t possess any invulnerability and can be hurt by humans, tasers, and electricution.  Also, when he uses his ability too long, his nose begins to bleed and he is severely depleted of energy and is unable to use his super speed (Justice 6.11).

He also has a supercharged metabalism that requires an abnormaly high caloric intake.

Smallville’s “Impulse” Additional Info:

• Like his fellow Justice League members, when he first met Clark he attacked him. However, this was about a day after he really first met him, when Bart used kryptonite against him.
• Bart was given the codename Impulse by Green Arrow, aka Oliver Queen, in Smallville but was given the same name by the Batman in the comics, saying that it was a warning instead of a compliment.
• Bart is the first member of the Justice League that Oliver recruited
• Bart easily outruns Clark. In various other media, the Flash either is a few steps ahead, or otherwise ties Superman.

Source: Smallville Wiki