the Namine at the end of Coded is fake. It is transmitted data, made to remind someone about TAV, basically Mickey needs to tell Sora about TAV. Which in turn ends of writing the letter we see at the end of KH2. Which means the secret ending is 1 year later than KH2.
Days is related because Ven's appearance but thats really all to it besides the Chamber of Awakening thing.
Days is related because Ven's appearance but thats really all to it besides the Chamber of Awakening thing.