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