Here is the full list of all 19 Pocket Penguin ( ポケットペンギン): A Game Boy Style Adventure achievements.
Collect your first bomb
Have the 8 Bombs
Find at least one of the Heart Containers
Have the 6 Heart Cointainers
Collect 600 Coins
Catch at least 200 fishes
Reach level 5-4 in Colorful mode
Talk to Mr. Warlus in each world
Use the Ice Cream
Collect 99 lives
Finish the Peaceful Plains
Finish the Old Desert
Finish the Lavender Ocean
Finish the Autumn Forest
Finish the Risky Ice
Finish the game
Finish the game in Master Mode
Reach the final boss with only two bombs
Buy all the costumes from Sally the otter