Jungle Fever was a mission on Spineworld.
Old Leaf gives the player two shells, and says to fill one with water, and one with earth.
Fill a shell with the source of water that is in the Temple Gardens, in a puddle just southwest of the pool, there will be a sparkle in the puddle (same with the earth). Fill the other shell with the source of earth that is in the Bongo Camp, the pile of rubble east of the tent. Then go back to Old Leaf.