Croc Swampland
Switch to Rogon and power up with Chi. Then charge attack a large rock wall near the swampy water. Once it is broken down, you can access the pad that takes you to the Croc Swampland.
Croc Fort
Switch to Cragger and get to the second scene of the Croc Territory. Then walk to the end of the dock and jump down into the water.
Sink down into the water and attack the plants that have tangled up the steps so that, once released, they float up to the surface.
Jump back up onto the docks and then jump across the steps to get to the pad that takes you to the Croc Fort.
Beaver Village
Attack a tree next to the water to knock it down so logs are floating in the water.
Jump across on the logs to get to a wooden walkway that takes you to the Beaver Village.