After opening the Gloomy Cavern during the main quest of the Fireworks Festival, you’ll need to discover additional Launch Tubes to unlock the other enigmatic cavern doors in Infinity Nikki. This task isn’t straightforward—understanding the provided maps will take some effort, but the treasures inside make it worthwhile. Your initial goal is to locate all three remaining caverns on Firework Isle.
These cavern doors, first encountered in the main event quest “The Wonderful Journey“, require three Launch Tubes to unlock. You’ll need to use an outfit with the Firey Glow ability to release them. Each entrance has a stone map situated in front, indicating the positions of other caverns on the island along with the Launch Tube locations you must activate to open them. Collect all three tubes for each door to access the hidden treasures within.
Locations of All Caverns on Firework Isle
Three Additional Caverns, Some More Concealed Than Others
Firework Isle features four caverns, with the first revealed during the main event quest. The other three can be identified using the stone map near the Gloomy Cavern or through exploration. One cavern is located just north of the Songbreeze Highland Hillside Warp Spire and is easily spotted.
The remaining two caverns are also nearby. The one furthest east can be found behind the waterfall that feeds a body of water northeast of Sparkheart Island. Descend from the cliff at the waterfall’s summit and use your Floating outfit to enter. You’ll also discover a Greedy Pouch inside this cave, so pick it up for some extra Bling.
The last cavern is located along the western coastline of the island. I descended from the Fireworks Peak Warp Spire and floated down. If you stray too far north during your descent, you might have to deal with some Esselings, but they are manageable. Once you reach the coast, follow the trail made of Bling and lamps to find the final cavern.
Locations of All Launch Tubes
Nine Launch Tubes to Discover
Reading the maps displayed outside each cavern door can be challenging, especially due to the perspective of the mountains. For the first cavern, you’ll find Launch Tubes at the peak of the peninsula by Clearheart Lake, on the cliff south of the Warp Spire, and southeast of the island’s main dock. One of the cliffside Launch Tubes is partially concealed by some trees but is fairly easy to locate.
For the second cavern, the Launch Tubes are located on the beach southwest of Sparkheart Island, south of the broken bridge near the Relic Isles, and north of the hot air balloon fields. These locations should be straightforward to find and don’t require any combat. None of these Launch Tubes are hidden, so they should be simple to spot as you approach the marked areas.
When you have a Firework Ability Outfit equipped, the Launch Tubes will glow and be outlined in green as you near them.
The Launch Tubes for the third cavern present the most challenge. The southernmost tube is guarded by Esselings located southeast of the Songbreeze Island Foothills Warp Spire, but they are mostly bunched together, making them manageable with a few well-placed Purifying Orbs. The eastern Launch Tube requires some jumping to reach, and can be approached from either the Crescent Shoal Warp Spire or the Sparkheart Island side of the Relic Isles. Thankfully, the final Launch Tube is conveniently positioned, exposed, and unguarded.
Once you activate all the Launch Tubes, you can access the sealed doors of each of the three caverns. While each cavern contains a varying number of treasure chests, you’ll receive a substantial amount of gems for your efforts. This is just one of the many puzzles awaiting players on Firework Isle, not to mention the numerous activities available during the New Bloom Festival. Infinity Nikki enthusiasts will find plenty to do with all the 1.2 updates, and they will be rewarded for their dedication.
