From WiKirby, your independent source of Kirby knowledge.
Samus (full name Samus Aran) is a guest character that Kirby meets up with in Stage 2 of Iceberg in Kirby's Dream Land 3. She is an intergalactic bounty hunter who travels from world to world, often with the objective of hunting down Metroids. She is easily recognized by her tall and imposing figure, clad in her signature red and orange power armor (though her height relative to Kirby's in Kirby's Dream Land 3 suggests she is much shorter here than in her home series).
Kirby can find her at the very end of the stage, and she will give Kirby a Heart Star if he took care of the Metroids earlier on in the lava caverns. When appearing before Kirby, Samus will have her helmet on if the Heart Star condition is not met, and off if it is.
In the Super Smash Bros. series
Samus and Kirby also appear together as playable fighters in every installment of the Super Smash Bros. series. Samus is known for her heavyweight-but-floaty characteristics and her use of projectiles and other long-ranged attacks. In each game, Kirby can copy her to gain her helmet and the ability to fire Charge Shots as his neutral special attack.
Samus as she appears in Kirby's Dream Land 3
Samus as she appears in Kirby's Dream Land 3 (no helmet)
Kirby meeting up with Samus in Kirby's Dream Land 3
Kirby with the Samus ability releasing a Charge Shot in Super Smash Bros. Ultimate
Names in other languages