Burning Secrets (Up the Lava Stream in the British English localization) is the twenty-first stage in Kirby and the Rainbow Curse. It is the first stage of Red Volcano. It succeeds Hooplagoon of the Lake and precedes Back to the Battleship.
Kirby enters a hostile, fiery environment in this stage. Elline must draw rainbow ropes to shield him from pouring lava--the hero will be instantly KO'd if he touches it. Later in the stage, Kirby rides gondolas across tracks at high speeds. Claycia's battleship Bastron, previously destroyed in the stage Kirby Rocket's Big Blastoff, returns with a vengeance by once again firing cannonballs at the pink puff.
Burning Secrets gets its name from the many Point Stars hidden in the stage. By rolling near seemingly empty spaces, Kirby can uncover Point Stars taking the formations of playing card suits: a heart, a club, a spade, and a diamond.
- Unlike all other stages, when Burning Secrets is played in multiplayer mode, Grab Hands attack on two separate occasions rather than being confined to one area.
- The stage features a rearrangement of the mid-boss theme from Kirby 64: The Crystal Shards.