Yellow

Yellow is one of White's best friends, and a co-founder of the Dark Matter Resistance, alongside White, Red, and Orange.

Appearance
Yellow looks like any other Popopo, but looks almost identical to Keeby. He is yellow with orange feet, and yellow eyes.

Abilities
Yellow is an electricity elemental; he can electrocute things at will.

In The Adventures of White
He is playable in both versions of the story. He is the third to be unlocked in Single Player, and is a default character in Multiplayer.