Shuckle prevents all of attacks, including damage, done to it by Pokmon that have Special Energy cards attached to it
The main one that works with your finality counters is Fains second ability, letting you remove a counter from one of your creatures to make a Treasure token
During your Main Phase: You can Special Summon 1 Ashened monster from your hand, except King of the Ashened City, or if your opponent controls a monster with 2800 or more ATK, you can Special Summon it from your Deck instead
A couple of additional Japanese-exclusive Rayquaza ex cards were distributed in 2004 Gift Box Emerald and 2005 Master Kit half decks, neither of which had English reprints
You can also tip the scales a bit with the right deck
Overall the decks are great