The tetralogy's main focus is the return of the Dark Matter species and force as a whole, as Kirby must fight the race altogether once more. While the connection to Dark Matter does not become major or significant story-wise until the second installment, the Dark Matter race have involvement in the plots of each of the first three.
As previously stated, there are four games throughout the tetralogy (hence why it's a tetralogy), each one having the Dark Matter race involved in some way.
- The tetralogy also brings back many past elements of the original Dream Land trilogy and The Crystal Shards; these include Animal Buddies, the return of characters like Gooey and Adeleine, and actual Final Weapons, that are treated like ancient relics over all.
- The tetralogy was inspired by Shadow Inferno (t∣b∣c)'s trilogy of Kirby games that focused around the resurrection of Zero and the return of the Dark Matter race.