Here is the full list of all 28 The Smurfs - there are Mission Vileaf achievements.
Complete the 100% of the game
Find every vial
Find all of the mandrakes
Find all of the mushrooms
Find every piece of bark
Make 10 flowers of every color grow by using the Smufizer
Build all of the upgrades
Find all of Jokey’s presents
Get across the Laboratory without getting caught by Gargamel
SmurfoGlide for 10 seconds
Jump on 3 Vilecritters' heads in a row
Find and wake up Lazy 3 times
Heal the entire village
Perform a SmurfoSprint, Jump and SmurfoSplat combo!
Complete the adventure in Easy mode
Complete the adventure in Normal mode
Complete the adventure in Hard mode
Complete the Chapter: Gargamel
SmurfoSprint for 100 meters
Make Papa Smurf cough
Complete the Chapter: The Swamp
Complete the Chapter: The Castle
Perform 10 perfect jumps in a row
Destroy 100 crates of Sarsaparilla
Build your first upgrade
Complete the Chapter: The Forest
Complete the Chapter: The Village
Find the flower for the Smurfizer