Who is Sparxie?

Sparxie just appeared after we had a long discussion with Sparkle about Planarcadia (tutorial basically to explain a bit how the various mechanics of the world work). Sparkle referred to her as "her enemy" and one of the people participating in the "Phantasmoon Games", but they're basically identical visually aside from some different color which brings the question about what exactly Sparxie is.
Sparxie herself refer to Sparkle as "older model" so I wonder if she is one of those "paintings" that they mentioned earlier in the story that become alive and started acting on their own. I feel they have to be separate entities also because of the various things that Sparkle got involved with in the recent past, how could she keep her streaming and presence in Planarcadia ongoing if she was traveling all over the universe?

About the new zone. It's honestly the best in my opinion, I love the modern urban design of the city a lot more compared to what we've been used to in the previous two zones (Penacony was more "noire-style" while Amphoreus was ancient Greece/Rome). There's also lots of new mini games like a 2D pixel platformer to a more complicate 3D puzzle with rotating aspects.
Oh and there's a new card game named Cosmicon Collective in which players choose one card to use (with special skills) and use dices to roll attack/defense values. The damage made is the difference between attack and defense (except special skills that may penetrate defense or similar). Seems like a fun thing to pass time with, plus they give a free 4* after playing the event with it so I'm all for it.