He is shown to be a bully throughout some of the earlier Baby-Sitters Little Sister books and he knows that, a couple of kids such as Sara Ford calls him the meanest boy in the class. Such as when he and his friends would picking on Pamela Harding in Baby Animal Zoo. If she didn't hold a baby animal, he and his friends would wear a shirt that says Pamela Is the Biggest Baby at Stoneybrook Academy to school everyday for a month.
He moved in a couple houses down from Nancy Dawes and Karen Brewer in Little Sister #31 Karen's Bully. After the events of Karen's Bully, he has slowed down on his bullying ways. In Karen's Movie he helped filmed the movie her her grandfather. In Karen's School Bus, Nancy said that Bobby protected her from the big kids.
In Karen's Ice Skates Bobby had fell into the pond before it was frozen over. Karen and Nancy had pulled him out of the water and called 911. He had spent some time at the hospital before being released.
- Hank Reubens (sometimes)
- Ian Johnson (sometimes)
- Omar Harris
- Chris Lamar
- Ricky Torres
- Karen Brewer (when he is home and not at school)
- Nancy Dawes (when he is home and not at school)
- They used to have a dog before he moved to the new neighborhood.
- Harriet a pet mouse
- Going up high on the jungle gym.
- Hootie the class guinea pig
- His sister
- Being scared
- Writing and spelling
- group work with nothing but girls
- BSC #52 Mary Anne + 2 Many Babies
- BSC #86 Mary Anne and Camp BSC
- Little Sister #31 Karen's Bully
- Little Sister #53 Karen's School Bus
- The Kids in Ms. Colman's Class #7 Science Fair
- Little Sister #63 Karen's Movie
- Little Sister #56 Karen's Ice Skates
- He attended circus camp and camp BSC (not at the same time).
- He appears as a Lost Boy in the production of Peter Pan.
- In Holiday Time he is part of the Hanukkah group.
- He thinks Natalie is okay despite teasing her from time to time. He dislikes Karen calling her his least favorite person in the class.
- Bobby is apathetic about science classes.
- He once got an ant farm for Christmas.
- Has once been to a different circus camp then the one the BSC hosted.
- In Karen's Home Run he entered the bike decorating contest. He said that if won he the one hundred dollar first prize, he'd buy a bunch of CDs.
- He likes to pull pranks on people like in Karen's Big Joke and Karen's Haunted House.
- In Karen's Field Day Karen says that he's a fast runner.
- He doesn't like the schools mystery meat.