Talk:Battle Spirits/@comment-11836-20150206182647/@comment-9105494-20150207005824

Battle Spirits isn't exactly big on crossovers, you're probably mixing it up with Weiss Shwarz or something. The only crossover cards have been from Keroro Gunsou and Idolm@ster, and technically AKB48. So Toho Kaiju getting an entire expansion of their own is quite a pleasant surprise.

Mixing cards of different sets and colors is entirely kosher, though I wouldn't recommend using just any random mishmash.