Background character

Background characters are, as the name implies, characters that appear in the background of some stages, they will appear in a stage that correspond to their home universe (i.e Shy Guys appear in Yoshi's Island). Note that background characters shouldn't be confused with stage hazards.

In Super Smash Bros.

Dream Land

• King Dedede appears floating in the background.

Saffron City

• A Pidgey appears flying in the background.

Yoshi's Island

• Shy Guys appears in the background.
• A Goonie, in it's Yoshi's Story design, occasionally flies in the background.

Congo Jungle

• Necky appears flying in the background.

In Super Smash Bros. Melee

Brinstar

• A statue of the chozo appear in the background.

Brinstar Depths

• Kraid appears in the background of the stage.

Fourside

• A U.F.O appears in the background and can be boarded.

Yoshi's Story

• Again Shy Guys appear in the background, this time holding Food.

Jungle Japes

• Cranky Kong is seen walking back and forth in his cottage and rocking in his chair at various times.

In Super Smash Bros. Brawl

New Pork City

• A statue of Pokey Minch from Earthbound appears in the right side of the stage.

Lylat Cruise

• Multiple ships appear battling in the background.

Smashville

• Villagers from Animal Crossing appear in the background.

Yoshi's Island

• For a third time, Shy Guys appear in the background.

Frigate Orpheon

• The Parasite Queen, Metroid Prime's first boss, appears in the background in Frigate Orpheon.

Pokémon Stadium 2

• Electivire, Drifloon, Hoppip, Skarmory, Cubone and Dugtrio all appear in the background of the various elemental transformations of the stage.

Green Hill Zone

• Tails can be seen running up and down the loop-de-loop.