Easter egg

Easter eggs are usually hidden surprises or tricks. They are small surprises programmers add to their media for players to uncover, much like chocolate eggs in a real-life Easter egg hunt. Many Easter eggs are purely for entertainment. Some examples include hidden names or faces of programmers, references to other games, or messages for the player.

Easter eggs should not be confused with glitches, cheats, or techniques. Many do not alter gameplay at all, and are added on purpose.

Characters

 * The text "Smaaaash!" will appear when Ness swings his fully charged bat; this is a reference to the sound effect in Earthbound.

Stages

 * Frank, a Mr. Saturn with a camera found on Saturn Valley, was based off the Photo Guy and Frank West from Earthbound.
 * In 0.9a, Qui's name was signed on Dracula's Castle. This was removed in 0.9b.
 * Since v0.8a, on the Sky Sanctuary Stage, if the player(s) look closely at the background, sometimes they can watch an Egg Robo fliying trough the stage. Despiting the stage was redesigned in v0.9a, this easter egg is still present. On the same stage, Mecha Sonic is visible in the background, albeit Knuckles ruined it in their battle on Sonic & Knuckles, however, the Mecha Sonic easter egg is not present in the preview of SSF2 Beta.

Website

 * On the Super Smash Flash Dojo, a message saying "You are a nasty code-snooper!" can be read by viewing the page source.
 * At the bottom of the Super Smash Flash Dojo, a message saying "Want to see something cool?" will appear. If you highlight it, the page will rotate in a full circle and redirect you to the "How to play" section.