A Protective Bag (originally just called bag) is an object present in Kirby's Dream Land 2, often found in rooms containing Mid-Bosses. Once all foes guarding the bag have been defeated, the bag will drop if it was hanging from a chain and open up, revealing one of Kirby's friends. Usually, this will be either Rick, Kine, or Coo, but if Kirby is already with the friend that is being rescued, Gooey or girl blob (Chao in the Japanese version) could also appear from a bag. If a bag lands on Kirby, it will knock him back as if he was hurt, but deal no damage.
Some bags are guaranteed to drop a particular friend when opened, though if Kirby already has that friend, a different one can appear instead. Bags may also open up to reveal nothing at all in this case.
In Kirby Star Allies, Rick & Kine & Coo and Gooey use Protective Bags when guarding, referencing Kirby's Dream Land 2. Gooey can also use this technique in Kirby Fighters 2. Additionally, one of the Stone ability's transformations in Kirby Star Allies and Kirby's Return to Dream Land Deluxe is a statue of Rick, Kine, and Coo emerging from a Protective Bag.
In the Kirby novel series
In the Kirby novel series, a Protective Bag appears in Kirby: Save the Rainbow Islands! as a knitted pouch that Pick wears around her neck. Pick gives Rick the pouch she wore as a good luck charm. To restrain Pirika, Meta Knight and King Dedede after their defeat, the group stuffs them in the pouch, which can stretch into a bigger size. When Meta Knight and King Dedede regain their consciousness, they burst out of the pouch, releasing Pirika too. At the end of the story, Rick thanks Pick for giving him the pouch.
- "When the friend comes out of the bag, you can go with him." –Kirby's Dream Land 2 instruction manual (page 13)