Secret cave

Banana Bird Caves are caverns located all across the Northern Kremisphere.

When Baron K. Roolenstein, under the guise of KAOS, invaded the Northern Kremisphere, to make sure he was unopposed, sealed away the powerful Banana Bird Queen. To make sure the queen couldn't escape, K. Rool had the Kremling Krew hunt down and capture the queen's various children, the Banana Birds. Though the Kremling Krew didn't capture all of the Banana Birds, they did obtain the majority of them, sealing these in caves located all over the Northern Kremisphere.

During the events of Donkey Kong Country 3: Dixie Kong's Double Trouble!, Dixie Kong and Kiddy Kong, on their quest to find the missing Donkey Kong and Diddy Kong, would sometimes stumble upon a hidden Banana Bird Cave. In order to free a crystal-imprisoned Banana Bird, the Kongs would have to play a memory game with flashing red, green, yellow, and blue crystals. The crystals would flash in a sequence which the Kongs must copy. If they copy the sequence correctly, they will free a Banana Bird; if they fail, they will have to try again. As the game progresses, it becomes increasingly difficult to free a Banana Bird due to the crystal sequence flashing at a much faster pace and increasing in length.

Occasionally, the Kongs may need help to reach Banana Bird Caves. This help often comes in the form of members of the Brothers Bear family. In exchange for a favor or something similar, a bear may sometimes open the path to a Banana Bird Cave.

If the Kongs manage to free all of the Banana Birds, they will be able to free the imprisoned Banana Bird Queen from the Evil Barrier.

Aside from the aforementioned Banana Birds and flashing crystals, there is not much in a Banana Bird Cave, though what looks like tunnels can be seen in the background of the caves, leading to the possibility that the caves are inter-connected to one another.

Locations

 * Bounty Beach – Northern Kremisphere overworld, east of Funky's Rentals. It can be reached by any of Funky Kong's vehicles.
 * Kong Cave – Northern Kremisphere overworld, northwest of Bazaar's General Store, behind several rocks. The Hover Craft (or better) is required to reach it.
 * Undercover Cove – Northern Kremisphere overworld, north of the waterfall near Kong Cave. The Turbo Ski or Gyrocopter is needed to reach it.
 * Belcha's Burrow – Northern Kremisphere overworld, southwest of Bazaar's General Store, across the water. The Gyrocopter is required to reach it.
 * K's Kache – Northern Kremisphere overworld, on the island in the northwestern lake. The Gyrocopter is required to reach it.
 * Hill-Top Hoard – Northern Kremisphere overworld, far northeast cliff. The Gyrocopter is required to reach it.
 * Smuggler's Cove – Lake Orangatanga, along the northern beach.
 * Arich's Hoard – Kremwood Forest. Once Brash's record is beaten in Riverside Race, he will throw a tantrum, revealing the entrance across from Bobbing Barrel Brawl.
 * Bounty Bay – Cotton-Top Cove, slightly northeast from Bazza's Blockade.
 * Sky-High Secret – Mekanos, get Big Bessie working again to reach it.
 * Glacial Grotto – K3, west of Blizzard's Basecamp.
 * Clifftop Cache – Razor Ridge, via Björn's Chairlifts.
 * Sewer Stockpile – KAOS Kore, behind the grate. Decode Baffle's clue to enter.
 * Whirlpool Wreck – Pacifica, swim north of Barbos's Barrier. (Game Boy Advance version only.)