Mighty Mountain Player

Mighty Mountain Player is an unnamed third grader who attends Mighty Mountain School. She is on the Mighty Mountain soccer team.

Her personality is not known (since she is a background character), but she appears to get along fairly well with Francine in the episode" April 9th" where she and Francine were thumb wrestling each other.

This adds to the fact the rivalry between Mighty Mountain and Lakewood is just a sports rivalry and nothing more. She also spoke for the first time during the episode "Nicked by a Name."

Physical appearance
3rd Grade Female Bear is a bear with cream complexion who wears long orange pants, a white collared shirt with buttons, a blue vest, and blue and white sneakers. She also has long blonde hair wrapped in a ponytail with a red hair tie. In most of her appearances she along with her teammates are seen wearing their sports uniform.

Friends

 * She got along--and even thumb-wrestled with--Francine during "April 9th", but it is not known if their friendship continued afterwards.
 * She was seen talking on the playground with 3rd Grade Female Bear (Number 3) and 3rd Grade Female Aardvark (Number 7) in "April 9th".

Appearances

 * Season 1
 * Arthur Makes the Team 11902
 * Season 2
 * Arthur's Lucky Pencil 20202
 * Season 5
 * Nerves of Steal 50202
 * Season 6
 * Muffy's Soccer Shocker 60401
 * Friday the 13th 61002
 * Season 7
 * Francine's Split Decision 70201
 * Waiting to Go 70402
 * April 9th 710
 * Season 10
 * Binky vs. Binky 100801
 * Season 14
 * Nicked by a Name 140301
 * The Long Road Home 141002

Trivia

 * "April 9th" was the only episode where she is ever seen wearing her regular clothes and not a sports uniform.
 * "Nicked by a Name" is the only time she was ever heard speaking.