Jim was an antagonist in the kindergarten series but never was seen in the first grade ones. He and Junie B would fight and call names. But in Junie B. Jones and the Mushy Gushy Valentime he admitted he was the one who gave her that valentine and actually likes her. He still hides it though.
Jim at first is a child who is mad about starting kindergarten in "Stupid Smelly Bus". But in the end of the 1997-2000 series Jim is secretly Junie B.'s boyfriend. Jim does not appear in the 2000-2010 series
Grandma- his grandma was seen at the grandparents day celebration in Room 9 in the book " Sneeky Peeky Spying". She tried to hug Jim but Jim wouldn't hug back so Junie B hugged her.
Dad- his dad was seen on "Stupid Smelly Bus" when dropping him off on the bus.
Pet Rooster- he brought his pet rooster for Pet Day in "Smells Something Fishy".
Paulie Allen Puffer- he and Paulie Allen Puffer are best buddies. As seen in "Peep in her Pocket", they enjoyed teasing Junie B for her fear of roosters.
Crybaby William- he was seen sometimes hanging out with Jim.
Junie B- they were worst enemies in kindergarten. They fight and call each other names. But in the book "Mushy Gushy Valentine" he admitted he likes her, just hides it. He was the one that gave her the valentine. But he didn't officially befriend her till "Graduation Girl".
- Jim is one of three characters to have their grandma shown in the books. The others are Junie B. and Lucille.
- In Junie B. Jones Has a Peep in Her Pocket, Jim still teases Junie B. despite admitting he likes her in the previous book.
- He does not officially befriend her until Graduation Girl.
- He is one of three boys to be attracted to Junie B., the others being Ricardo and Warren.
- There is a possibility that Herb likes Junie B. but it is not confirmed.
- Jim is one of the few characters to start on a bad note with Junie B. but end on a good note. The others are Oliver "Ollie" Jones, Principal
- He is a very stinky meanie and smells like stinky gym socks.