Here is the full list of all 20 Twinsen's Little Big Adventure 2 Classic achievements.
Acquire the Ball of Sendell
Visit the island across the Hacienda and gain the Protection Spell
Become a wizard
Heal your Dino-Fly
Make the rain disappear
Collect 500 Kashes
Visit the Emerald Moon
Get Baldino to upgrade your jet pack
Learn the Ferryman’s Song
Reach Island CX
Complete the game
Control the crane in the gem mine
Jump through the hoop in the Otringal dog park
Kiss the frog on the island of the Wannies
Find one of the two secret rooms in the Gazogem Factory
Heal the bowler’s back (warning: his opponent will not be amused!)
Beat Stanley Opar in the Emperor’s Palace
Follow the race car driver on Desert Island
Free Joe from his clam in the Cemetery of the School of Magic
Unlock all items in the game