My kids are getting interested in Pokemon TCG, so I'm trying to figure out the different series and sets. I played Magic the Gathering for a little while, which has helped me understand some of the terminology (e.g., starter sets, theme decks, booster packs), but some things seem to be different. Specifically: what are the differences within/between Pokemon series?
For example, what are the differences between the Black & White Dragons Exalted set and the Black & White Emerging Powers set? And what are the differences between the Black & White series and the Heartgold & Soulsilver series?
I understand that the different sets/series have different cards in them, but is there anything else? In Magic the Gathering, the different expansion sets had extra mechanics not seen in the core set. Note that I'm more interested in the differences pertaining to gameplay than to collecting.