But how do you explain his cameo in the Double movie???
Where does that fit in the series?
I was talking about Movie Wars Core in that last post, not the Double summer movie. The Double summer movie can fit in OOO at any time Eiji had his 3 main core medals to transform by himself, rather than Ankh carrying them around. It took place in 2010, not 2011.
Considering how the first few episodes of OOO apparently took place in 2009 if these dates are right, but it's already on December 2010, there's more than enough time for Eiji to go to another city that's getting blown up by a terrorist group and return to wherever he lives before the next story.
Now that I think about it, those earlier dates
needed to be 2009, not 2010, otherwise Eiji wouldn't have been active early enough to appear in Double's movie. It took place before 8/28/2010 (the date Philip disappeared), but the earliest date we got in OOO was "9/13". If that had been 2010, they wouldn't match up... but, considering how we've gotten two different episodes taking place on 10/19, and the later was in 2010, it means the series started on 2009, giving Eiji more than enough time to appear in Double's first movie.
You can say the episode happened after ep 44 if Ryubee didn't die then.
The Double summer movie is canon to Double. That's not even open to discussion. They specifically show the Fuuto tower getting rebuilt right in the beginning of the arc that resulted in Terror's death, and that was due to the events of the movie.