Bradley often has his doubts when it comes to Milo, and the trail of destruction he leaves behind. He attempts to persuade Melissa into staying away from Milo. In The Undergrounders he is jealous of Milo and the attention he gets. He also appears to have a slight crush on Melissa, though he attempts to play it cool. We're Going to the Zoo reveals that he has a somewhat malicious streak, as shown when he deliberately teased a giraffe by offering it carrots and then withholding them.
He's fair-skinned, has jet black hair with the longer part on one side, wears glasses, wears a gray and white plaid shirt with two pockets and medium gray pants. He also wears a burgundy colored bookbag.
Bradley seems to question why Melissa is friends with Milo. He might have a crush on her, as he names his team after her despite her working with Zack and Milo and he even tries to sit near her during a pep rally and tries to get her to come to him during a football game.
Has a fairly neutral attitude to Mort but seems slightly annoyed by him in " The Undergrounders"
The image gallery for Bradley Nicholson may be viewed here.
In your face, other people.
Bradley's voice actor also portrayed Phineas Flynn in Phineas and Ferb; Bradley has been described as the polar opposite of Martella's previous role, which would make him a negative, non-creative, non-triangular-shaped-headed guy. Which he kind of is.
In a promo on Disney XD Africa's YouTube channel, it states that Bradley feels he is the perfect soulmate for Melissa.