In addition to the two decks and Machamp, there was also a starter rules sheet, rulebook, damage counters, and a card checklist
Unlimited highest volume of cards printed, therefore less rare and valuable than the other two 1st Edition and Unlimited are pretty self-explanatory, but people often get a bit confused regarding Shadowless Pokemon cards (totally understandable!) If you want to do a bit of extra reading Ive written a handy guide to Shadowless Pokemon cards here
Pokemon stopped using Kadabra in the TCG after Uri Geller sued them over the Pokemon's likeness to his persona
Like Ephara, God of the Polis, a flicker deck centered around Feather is going to be focused on incremental value, but rather than drawing lots of new cards, youre going to be using the same handful as many times as possible
They all come from the same source because the share the same flaws