darkSpyro

Given that the game's been out for several months, I'm sure this question must have been asked several times. If there's a FAQ covering things like this already, could someone steer me in the right direction so I won't be repeating old questions?

Anyway, when I activated a second Skylander of the same element this afternoon I noticed the game say that there was a power boost in that element for doing so. I assume that boost enhances all Skylanders of that element, but by how much? Does it increase with each additional Skylander? Do Multi-Spyros let you boost Magic higher than the other elements? (Probably not.)

All Skylanders start with a basic 25 Elemental Power. For each new character from the same element it adds 7.

For example:
You start the game with Spyro, he has 25 Elemental Power. You buy Double Trouble and he increases the magic EP by 7... so both Spyro and DT have 32. Adding Wrecking Ball means all 3 would have 39... then Voodood would increase it to 46. Legendary Spyro will not add any elemental power, nor will Dark Spyro or any doubles as they count as the same character in the collection screen.
This is assuming you have done no Elemental Power heroics... with 6 EP heroics at +9 each that's another 54 increasing the EP to 100.