It's a No-Brainer

Summary
When Brain loses his cool and loses to Buster in the Math-a-thon, he decides it's time to give up his books and his nickname.

Major

 * Alan Powers
 * Arthur Read
 * Buster Baxter
 * Francine Frensky
 * Nigel Ratburn

Minor

 * D.W. Read
 * Binky Barnes
 * Muffy Crosswire
 * Francis Haney
 * Mr. Powers
 * Mrs. Powers

Cameo

 * George Lundgren
 * Fern Walters
 * Sue Ellen Armstrong
 * Alex
 * Maria Pappas
 * 3rd Grade Male Cat
 * Jenna Morgan
 * Beulah McInnerny
 * 3rd Grade Male Rat
 * 3rd Grade Male Dog
 * Jessica
 * Mary
 * 3rd Grade Male Rabbit
 * 3rd Grade Female Cat (Number 2)

Home Video
DVD:
 * Arthur's Travel Adventures