Here is the full list of all 20 Miles & Kilo achievements.
Completed the beach world.
Completed the desert world.
Completed the mountain world.
Completed the ruins world.
Completed the volcano world.
Jumped off water.
Completed a time attack without dying.
Collected every coin in a single time attack.
S-Ranked every level in a single time attack.
Completed a level without dying in Time Attack mode.
Completed a level within the target time.
Completed a level without throwing any fruit.
Completed a level without KO'ing any baddies.
KO'd every baddie in a level.
Ran a total of 50 kilometers.
Completed a level after failing 25 times.
Got a total score of 1,000,000 in PLAY mode.
Earned an S-Rank in a level.
Completed a Time Attack.
Completed World 1-6 without surfing.