Board Thread:General Discussion/@comment-5949188-20140704194818/@comment-12940403-20140707194307

They never explained how Tenma and Saru were related, though.

Not directly but from the episode where they first meet and the beginning of the last opening, Tenma is one of the talented soccer players whose genes created Saru, that's just common sense.

Nor did they ever verify if Zanark- or Tenma, for that matter, were SSC.

Gouenji said Tenma was, I can see it from his power to evolve Keshin and Soul, and Zanark can wipe a stadium with his power, SSC basically means a X-men and Feida is their base. Considering a certain move that Zanakurou used in one of the final episodes and how it happened, it's unlikely that Saru and Tenma's connection is the same as Zanark and Zanakurou's.

That scene lead me to think that Zanark is Zanakurou reincarnation, not that Zanakurou is Zanark disguised >.>