|“||Bouncy Sis desperately wishes she could jump as high as Bouncy, but she's a bit too big to get much air between her spring and the ground. This, of course, bothers her to no end, but you'll never get her to admit it.”|
|— Figurine description • Kirby and the Rainbow Curse|
Bouncy Sis looks to be a much larger version of Bouncy; she is a pink, UFO-shaped creature that sits atop a large metallic spring, wearing a bow on her head. Bouncy Sis has two smaller bows placed flatly on the sides of her head, a ring of red and orange lumps on her base, and frilly, pink lace adorning her base. The big bow on her head is covered in white polka-dots.
Bouncy Sis only has one attack: Bouncing up and down on her spring. She will either hop in place or hop moving forward. Bouncy Sis does little damage to Kirby if her attack hits, so she is a rather ineffective enemy.
Bouncy Sis appears exclusively in the stage Deploy the Kirby Tank!, the second stage in Yellow Dunes. Only one exists in the entire game. She bounds forward toward Kirby Tank; though she does not go after Kirby, her massive size makes her a dangerous obstacle. Kirby Tank must fire many shots to defeat Bouncy Sis.
Bouncy Sis's name is indicative of her relationship with Bouncy as well as her jumping capability.
|“||You'll need good timing to dash under these enemies as they bounce on their springs.”|
|— Official European Kirby's Return to Dream Land website|