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