For how long did Shredder have the Technodrome?

[Original TMNT Cartoon Fan]

Originally Posted by Leo656

But they DIDN'T think of it. Just like the people writing the He-Man cartoon didn't bother to think of any explanation for where Snake Mountain came from, or why Skeletor hung out there in the first place.

There was a "series bible" for writers, but not everything made it to the cartoon.

http://mysteriesofgreyskull.tripod.c.../MOTUbible.htm