Bonus Chance
Bonus Chance is a term for the Sub-Games that can be played with the Bosses in Kirby's Dream Land 2. Completing these Sub-Games is a requirement for 100% Completion of the game.
Each Boss - except for the boss of Dark Castle - provides a bonus chance, which Kirby can play after defeating them by re-entering their doors. Each bonus chance is different, and completing or failing them will cause the door to the boss to close, until the game is reset.
Like other Sub-Games, points or 1-Ups are awarded for completing Bonus Chances, with 1-Ups being awarded for a 'perfect' performance. A Bonus Chance ends early if Kirby is hit at any point during the game.
Bonus Chances by Boss
Whispy Woods
Whispy Woods offers the first Bonus Chance after he is defeated in Grass Land. Kirby (and his animal friend if he has one) is positioned to the left on a flat field, with Whispy to the right. Whispy takes turns alternately spitting out either Small Stars or Apples at Kirby. Kirby is tasked to collect the stars and either avoid or depose of the apples. To get a perfect performance, Kirby has to collect every star that is tossed out.
Nruff & Nelly
Nruff & Nelly offers the second Bonus Chance after they are defeated in Big Forest. Kirby (and his animal friend if he has one) is positioned in the middle of the three-tiered arena, as the game begins. Nellys run out of the holes in the sides of the trunks, while mini-stars follow a similar trajectory. Kirby has to collect all the stars in order to earn a perfect performance.
Sweet Stuff
Sweet Stuff offers the third Bonus Chance after it is defeated in Ripple Field. Kirby (and preferably Kine) are tasked with swimming through the underwater tunnel, nabbing stars and avoiding Gordos along the way. To get a perfect performance, all the stars must be grabbed.
Ice Dragon
In this Bonus Chance, accessible after defeating Ice Dragon in Iceberg, Kirby is tasked with collecting the falling stars while avoiding the Icicles. Collecting them all is necessary to earn a perfect performance.
Mr. Shine & Mr. Bright
Mr. Shine & Mr. Bright offer the fifth Bonus Chance after they are defeated in Red Canyon. Kirby is tasked with collecting stars from Mr. Bright while avoiding both Mr. Shine's bounding about and Mr. Bright's projectiles. Collecting all the stars is necessary for a perfect performance.
Kracko
The sixth bonus chance is made available after Kracko is defeated in Cloudy Park. Here, Kirby is tasked with collecting stars that shoot out of the cloud floor, while avoiding Co-Krackos doing the same. To get a perfect performance, Kirby must collect all the stars.
