I think Taro answered you in the last thread. But they are made by Shikaruna Koubo; that turtle-ish one is called "Garumega" and it was done in a special colorway for SF44. The other one is called "Chiwos," but I have not seen that version for sale yet. Another colorway was sold at SF44. They are around for sale on the usual suspects.
Hmm, dunno. Maybe it's like the arrangement with Inatzuma-Go and Rumble Monsters? I actually have no idea. I have not been able to find information on Shikaruna.
I got to see these at Superfestival last July. They are super cool. I think i was a bit discouraged to get one because of the size. They are pretty big and need a big show space of their own with spotlights.