Beyond Illusion is a fighting game for the 3DS. It uses the same gameplay with the Super Smash bros series, but the two games do not share characters.
The gameplay is similar to Super Smash Bros, where players use special attacks to knock each other off the stage. It utilizes damage percentages: the higher your percentage is, the farther you fly when hit. There is an alternative mode where players can fight in teams of two, as well as a story mode based around platforming.
Not much is known about the game's story, except that it involves heroes and villains fighting for supremacy in the birth of a new multiverse.