To unlock the Lost World, you must pass the first world. In the all the other worlds, you will start to find a ''Klubba's Koisk'' in each world. When you visit one, a Kremling named Klubba will ask you to give him 15 Kremcoins to enter The Lost World. If you do give 15 Kremcoins to Klubba in a particular world, you will unlock one particular level of the Lost World.
| Effect | How to unlock |
| "Animal Antics" Level | Give Klubba 15 Kremcoins in "K. Rool Keep"
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| "Black Ice Battle" Level | Give Klubba 15 Kremcoins in "Krem Quay"
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| "Fiery Furnace" Level | Give Klubba 15 Kremcoins in "Gloomy Gulch"
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| "Jungle Jinx" Level | Give Klubba 15 Kremcoins in "Crocodile Cauldron"
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| "Klobber Karnage" Level | Give Klubba 15 Kremcoins in "Krazy Kremland"
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| "Krocodile Kore" Boss | Beat the game and all 5 Lost World levels.
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