@nbballard, Yes, I know it is the lightcore, it has the foil card and everything and the packaging says light core. I haven't started up the game because I haven't even had a chance to open the package for the game.
@Salamando3000, I have tried Swarm, Crusher and Hot Head and nothing is happening.
Do you have to put it in the new portal of power? I don't see why the old one wouldn't work, but who knows.
No, but I think I know your problem. From what I have seen, the figures don't light up unless the game is up, simply turning on the console with the portal attached won't do that. I've seen exactly what you describe. Now the portal does turn on and glow colors, but the portal technology is actually two different parts and as I understand it, apparently they work separately.
You have the RFID reader and what is essentially an induction type charger. The portal likely doesn't turn on the charger part that provides power to the LEDs unless it the game is up and it can read/write, probably a power saving thing since an induction charger actually wastes a lot of power in the generation of the magnetic field. The portals in the store are "always on" and work regardless, but I don't think the lightcore or giants light up if the game isn't started.
Try it in the game and see what happens. His hand crystals should light up green. For reference, Series 1 Prism Break has one hand up, the other down, Series 2 has both hands down behind him (and has crystal armor down his back) and Lightcore Prism Break has both hands up in front of him.