Name of the file: Ikachan [3DS] - Author: ANO - [3DS]
When you free your friend Ben from behind a rock, in the chamber where you started the game, he says "Here's Johnny!", which is a famous line from the movie "The Shining."
See the character Quote from Cave Story
Hold down L and R while booting the game up. If done correctly you will see Quote from Cave Story run across the screen with the squid during the Nicalis opening sequence.