A brand new (and unexpected) "Imagine It!" Sticker.

The frame features the Characters' faction.
In case of Leo Metal Sonic, he belongs to Nefarious Empire.
The Leader of this Evil Fraction is Dr. Golden "Prepare-Up!".

Leo Metal Sonic is a Hedgehog / Lion Hybrid Robot and known as: The Shapeshifter.
This form of upgraded Metal Sonic has a tail and specializes in a Circus Performances.

He can morph as well, aside from his 2nd Form: Liquid Metal Lionhog into other appearances, to trick the Main Protagonist: Silent "Player-On!". And as you know, he can change into his Super Form.

While Alter Dr. Golden secretly created and prepared Metal Sonic...
(previously in Mega Merge Max Mix, just before Fierce Forces)
Silent's Memory and Imagination, after accepting the new rules and merging with the new game, caused for the robotic replica of Sonic the Hedgehog, to take on a more dangerous appearance and fit more into the "fantasy and fun" world of Fierce Forces.