1st edition shadowless booster box Base Set Pokemon Base Set (Shadowless) [Unlimited

Some of the sets have justifications for way more, like the five clans of Thakir or four awesome Final Fantasy-themed decks, but it is nice choosing between two

While Torrential Tribute seems apparent as a card to wipe the board and prevent Beatdown decks from gaining field advantage, Book of Moon was more of a response to the increase in powerful effect monsters like Don Zaloog that could be prevented from using their effects with Book of Moon

The celebrations for the 25 th Anniversary of the Yu-Gi-Oh

For an extra Energy, both of the powerful Pokemon may get 2 Energies from the Discard Pile

What I seem to recall is there were only a few combinations possible - pokemon wise