To unlock the Ground Tumble trick move for jungle exploration successfully complete the Terk challenges in World 1.
Jane -
To unlock Jane in the river surfing or water skiing challenges successfully complete the Terk challengees in World 1.
Terk the monkey -
To unlock Terk successfully complete the three Terk challenges in the final levels of the game.
Porter -
To unlock Porter in the river surfing or water skiing challenges
successfully complete the Terk challenges in World 2.