This course is a course on a shipwrecked ship and teaches you to use the shift button in order to get various other characters like ampersands. Once you hit all the boxes and get to the end, you will enter the captain's cabin where a Pokémon appears. The Pokémon is Mew and only unlocks if you have the Music Box sounds on.

Bronze Medal Requirements:
Investigate the Captain's Cabin by destroying all boxes. You will need to attack the music box sound to your keyboard and capture the Pokémon; Mew

Silver Medal Requirements:
Get a 5 Pokémon streak and capture the Pokémon; Mew

Gold Medal Requirements:
Get a 10 Pokémon streak and capture the Pokémon; Mew