Final answer:
Penny Peterson is the name of the character who defends Sherman during lunchtime at school in the animated movie Mr. Peabody & Sherman, although she is not depicted as being in a wheelchair in the film.
Step-by-step explanation:
The name of the kid in the wheelchair who tries to defend Sherman during their lunchtime at school is Penny Peterson. This character is from the animated movie Mr. Peabody & Sherman, where Penny is portrayed as a good-hearted classmate who stands up for Sherman.
Although Penny is not in a wheelchair in the movie, there might be a confusion with another character or a different adaptation of the story.
If we are referring to the character from the 2014 animated film, Penny Peterson fulfills the role of a friend who initially bullies Sherman but later becomes supportive.