[ElConvoy]

Quote:

Originally Posted by uchihabro77

I thought Decade was the answer for this, if theres a continuity issue, its because he brought them over himself and everyone gets returned to their respective universe after the whatever they were needed for.

Or the more common- BLAME DECADE!

That theory doesnt work all the time though. In movies like Super Hero Taisen or the recent Gaim/ToQGer Crossover it is shown that they already exist in the same world.