Use Flounder to move a boulder

Find a treasure using Digger Fish

Use Sebastian to hit an enemy

Complete Stage 1 on medium or higher difficulty

Defeat Stage 1 boss on medium or higher difficulty

Spend all your money at shop as Ariel

Complete Stage 1 on medium or higher difficulty without being hit

Clear Stage 1 on medium or higher difficulty in less than 2 minutes

Gather 9 lives

Complete Stage 2 on medium or higher difficulty

Clear the Sunken Ships on medium or higher difficulty with full health without using the shop

Clear the Stage 2 on medium or higher difficulty in less than 4 minutes

Defeat Stage 2 boss on medium or higher difficulty

Complete Stage 3 on medium or higher difficulty

Defeat Stage 3 boss on medium or higher difficulty

Clear Stage 3 on medium or higher difficulty in less than 2 minutes

Clear Stage 3 on medium or higher difficulty without opening the map

Complete Stage 4 on medium or higher difficulty

Clear Stage 4 on medium or higher difficulty in less than 4 minutes

Clear Stage 4 as Ariel on medium or higher difficulty without using the regular attack

Defeat the final boss and beat the game as Ariel on medium or higher difficulty

Defeat the final boss and beat the game as Triton on medium or higher difficulty

Complete the game on Difficult without using continues