Kingdom Hearts 2 Question

[[NAKED]Loki]

Ok my g/f wants to know if it's possible to go back and pick up chests as Roxas if your already Sora? She needs 2 more chests to complete Jimmnys Journal but those 2 are in Roxases area.

[Talon Karrde]

Try going through the beam in the basement? If not look up gamefaqs.com I'm sure they'll be able to answer the question