To promote the game in Japan, Nippon Ichi hired Shinonoko to create new artwork for Cave Story 3D.
Here’s a comparison of Quote, the protagonist, with Shinonoko’s art on the left and Nicalis’ artwork on the right.
Japanese Artwork for Curly Brace, Sue, Toroko, and the Doctor.
The Japanese version of Cave Story 3D will have additional content. Nippon Ichi included retro game collaborations with content from Ikki, Dragon Slayer, and Crazy Climber. Right now, Nippon Ichi is keeping the details of these collaborations under wraps.