Here is the full list of all 22 Avalanche 2: Super Avalanche achievements.
Beat any boss at the end of the cliffs (225ft)
Beat any boss at the end of the clouds (600ft)
Beat Chicken Commander
Beat the Great Wizard Ohe
Beat Big Mouth and Queen Birdie
Defeat both bosses in any double boss battle!
Defeat every boss in the game
Beat Mama Squid and a Sky Rider
Fall in the lava 3 times
Fall in the laval 50 times
Surf 22 falling blocks without touching the ground
Get a max-level Whirly follower in Endless Mode
Get a max-level Speedster follower in Endless Mode
Get a max-level Hopster follower in Endless Mode
Use the climbing gloves 15 times
Complete 15 missions
Complete 45 missions
Kill 50 Dragons
That's impossible. There's no way his height is over 3000ft!
Bank a total of 100 coins
Bank a total of 1,000 coins
Bank a total of 10,000 coins