Mickey Mouse
Despite nearly a century of screen time, Mickey remains emotionally constrained by corporate necessity. The mouse must embody Disney's brand values: optimism, friendliness, and wholesome entertainment. This leaves little room for the dramatic depths explored by his own supporting cast. Donald Duck rages; Goofy stumbles through existential confusion; Mickey remains pleasant. His emotional ceiling is enthusiasm; his floor is mild concern. This consistency is both his strength and his dramatic limitation, a creature trapped in perpetual professional cheerfulness.
Pikachu
The electric rodent's limited vocabulary paradoxically enables remarkable emotional expression. Through variations of "Pika" and "Chu," the creature conveys joy, determination, sadness, anger, and exhaustion. The Pokemon anime has depicted Pikachu in moments of genuine dramatic weight: near-death experiences, tearful separations, triumphant victories. Episode 39, in which the creature considers remaining with its wild brethren, demonstrated emotional complexity rarely afforded to mascot characters. One word, infinite feelings.