Dark Matter Swordsman's artwork from Kirby's Dream Land 2
|First game||Kirby's Dream Land 2 (1995)|
Kirby's Dream Land 2
In Kirby's Dream Land 2, Dark Matter takes over King Dedede and after defeating Dedede he shows his true form.. It flies up and Kirby grabs a sword and goes into space to fight Dark Matter's Swordsman form, taking on a strange mage-like form with a sword just like Kirby's. After beating that form, he turns into a single eye with manypetals, this is his true form.
Kirby's Dreamland 3
Dark Matter Returns in larger numbers to flood Pop Star in Kirby's Dreamland 3. In this game Dark Matter is presented as a species led by Zero. They are once again defeated by Kirby and Zero is seemingly destroyed.
Kirby 64: The Crystal Shards
Kirby: Squeak Squad
Dark Nebula, the main antagonist of Kirby: Squeak Squad is known as Dark Zero in Japanese. It was implied that he was a part of Dark Matter in the book celebrating Kirby's 20th anniversary and was confirmed by the creators in 2015.
Kirby Mass Attack
Darm Matter returned in a non-canon spinoff minigame from Kirby Mass Attack, he was a villain encountered in Kirby Quest. This game also featured the return of his Swordsman form.
Kirby: Planet Robobot
Dark Matter Swordsman returned in Kirby: Planet Robobot, albeit as a clone. Star Dream summoned him to test Meta Knight in Meta Knightmare Returns. Some of his attacks use the Rainbow Sword, the weapon that originally destroyed him, it was later confirmed by the developers that this Rainbow Sword was created Dark Matter's ability to reproduce things from memory alone, something that is first seen in this game. He was also fought in The True Arena back-to-back with the Queen Sectonia clone.
Kirby Star Allies
While they didn't physically appear in Kirby Star Allies, it is heavily implied that Void Termina is related to/ is the source of Dark Matter. It has a form similatr to regular Dark Matter, has Zero Two's wings in his flying form, has eyes similar to Dark Nebula in his humanoid form, does attacks similar to Miracle Matter, sometime makes Zero Two's fake face and has the ability to seemingly recreate things it has witnessed from memory alone in a manner that is very similar to how the Dark Matter Clone create the Rainbow Sword in Kirby: Planet Robobot. Hyness also mention that the Jambastion Mages have power over "a matter most dark" and considering that Void Termina is considered to be their god, its relation to the Dark Matter species as either a progenitor or another member is heavilly implied.