Mr. Bellamy

The Photographer is a unnamed character that has appeared in several episodes of Arthur. He has always been seen around a camera taking photographs, and in How the Cookie Crumbles it seems like he may have his own photography studio

Francine's Bad Hair Day
He was seen taking school pictures for Mr. Ratburn's third grade class. He was also shown to be the one taking photos the year prior.

D.W. Thinks Big
He was shown taking a wedding photo of everyone involved in Aunt Lucy's wedding. Photographs of Aunt Lucy were also visible, but it is unknown if he took those as well. Before he takes the photo and when D.W. comes in he is white, but when D.W. is leaving, he is brown.

Arthur Babysits
He had a very short cameo in the episode in a scene that takes place in Arthur's imagination.

How The Cookie Crumbles
After Muffy wins a contest, he is seen taking pictures of Muffy in his studio, This is the only time in Season 2 he's ever been seen.

Arthur Rides the Bandwagon
During Arthur's dream sequence, he was shown taking a group picture of Mr. Ratburn's class along with their Woogles. Since Arthur didn't have one, when he was a grownup he didn't got a one for his sister and his baby brother. she and the baby was going to away from home when they opened the door they saw all of arthur's friend's and the kids,

Quotes
Photographer: Are you lost little girl?  Photographer: This is a disaster.