|No Known Affiliations|
|No Known Relatives|
|No Known Friends|
|No Known Pets|
|No Known Nemesis|
|Behind the Scenes|
|"A Sitch in Time" (mentioned)|
Walter Nelson was a boy Kim Possible had a crush on in middle school.
At some point in middle school, Walter kissed Kim and their braces locked, leading to an embarrassing trip to the orthodontist to untangle them. Kim called Ron Stoppable for help when her braces locked with Walter's braces and Mrs. Stoppable, Ron's mother, drove the two to the orthodontist.
Walter apparently had enough of a romantic interest in Kim to kiss her at some point in middle school.
Behind the Scenes
Walter has no speaking parts.