Clone characters have been a part of fighting games since the original Street Fighter games with Ryu and Ken, but what exactly are they? While there is no standard definition for a clone, most define a clone in a fighting game as a character with a moveset and physics that are considerably similar to another character. Characters like Marth and Roy or Fox and Falco in Melee would qualify to most as a clone. For characters that are very similar but have some notable differences, they are subbed as semi-clones. Ness and Lucas in Brawl share somewhat similar specials but they interact differently and they do not share many normal moves so to most they are semi-cloneMany characters share similar moves but are not clones as well, in Smash 64 Captain Falcon and Samus share neutral aerials, down smashes, floor attacks, forward tilts, up tilts, and dash attacks, but have their own unique physics and moves as well to a point where they are not considered to be semi-clones.Smash even has it's own unique term for the way clones change between releases of sequels called "Luigification" referring to how Luigi started as a full clone of Mario in Smash 64 but has been decloned in each additional installment. Several clones have been "Luigified" over the franchise as well like Ganondorf and Falco.Want to know more about the clones in Smash 4? YouTuber Smash and Grab has released a video to explain how the clones work, the difference between clones and palette swaps, and more. The video has a similar style to Smash and Grab's previous Robin Guide which is fun and unique, so check it out!Hopefully all of this will help create a better understanding of clones especially within the Smash series. With Lucas on the way as DLC for Smash 4 it will be interesting to see if any other clones or semi-clones find their way into Smash in the future.