Maybe if we went with this image...
And we go with the dates of Quote's creation for the game and Cave Story's release, it may have this may be his credit card number.
So what goes for the security code in the back? Well, on Cave Story+, there's a special date event that can give you a certain Steam achievement, as well as play a unique song if you have the Wii soundtrack playing. Pixel's birthday, April 29th.
So this then means the 3 digit code on the back of Quote's credit card has to be 429.
Now, what about the expiration month and year? We all gotta know this crucial part! Well, it's kinda a bit tragic, because that would mean that Quote's card has expired 10 years ago! How so? The release of Cave Story for WiiWare. March 2010.
So there you have it, here is Quote's credit card information! But you gotta be quick so that Quote can secure the Demon Crown, and achieve the epic
victory royale!
Code:
1224 2000 1220 2004
429
03/10