Kamen Rider Decade with Showa-era Riders meets Rosario + Vampire in a Mega Crossover.
Let's Ride: Unabridged Version!
http://tvtropes.org/pmwiki/pmwiki.php/Laconic/ShowaAndVampire
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Kamen Rider Decade with Showa-era Riders meets Rosario + Vampire in a Mega Crossover.