User blog comment:Poptropica411/Phineas plus Isabella equals Phineas and Ferb: Across the Second Dimension in Fabulous 2D?/@comment-74.98.161.253-20110129205943/@comment-3329115-20110213212148

I don't even know, but I wish they would tell us. @A Wikia Contributor: Dang They SHOULD do a flashback.