As always, any mistakes, wording, or synergies you guys see, feel free to let me know; you know much more than I do of those things, and part of why I posted the spoilers was because I thought it best to show them to correct things before going to the trouble of making the cards, and then having to correct them, reupload them, etc.
Uh-oh. Just as a disclaimer, there is a lot of words below! That doesn't mean I don't like your work (I really love it!!), I'm just procrastinating. :x
One ---> 1; Two ---> 2; etc
bench ---> Bench
Flip a coin, if tails ---> Flip a coin. If heads
Opponent/'s ---> opponent/'s ---> your opponent's Active Pokemon
Deck ----> deck
Each turn, you can flip a coin.; Once by turn ----> Once during your turn (before your attack), you may flip a coin.
At any point during your turn ---> During your turn (before your attack)
Can't be retreated ----> Can't retreat
On the previous turn ----> On your last turn
all damage done to this Pokemon ---> [...] this Pokemon by attacks
used Alight ---> used its Alight attack
Number ---> number
all ---> each of
pick ---> choose
Pokemon Tools ---> Pokemon Tool cards
Each time ---> Whenever
For Gardevoir, there lacks clarification on where these Pokemon are (i.e. in play).
Also, nifty effect for Dazzling Light! It is very fresh and uses an interesting design space. However, you may like to change it to be a "During your opponent's next turn, your opponent flips a coin. If tails, [...]", as otherwise your opponent can just not attack and using this attack would be really useless. Anyways, for the effect, you'd only be able to redirect damage, not effects, in the case you have any attacks causing Special Conditions or other void effects. So, I'd word it like this (Ref: Some old Rampardo):
Flip a coin. If heads, if this Pokémon is damaged by an attack during your opponent’s next turn, your opponent must flip a coin for each of his or her Benched Pokémon. If that coin flips is tails, that Pokémon is damaged by that attack instead of this Pokémon and stop flipping coins (don’t apply Weakness and Resistance to Benched Pokémon).
Multitalented should be worded as (Ref: Aegislash XY):
As often as you like during your turn (before your attack), you may search your deck for a Meloetta and switch it with this Pokémon. (Any cards attached to this Pokémon, damage counters, Special Conditions, turns in play, and any other effects remain on the new Pokémon). Shuffle your deck afterward.
Majestic Style should be worded as:
As long as this Pokémon is in play, your opponent’s Pokémon’s attacks cost [C][C] more as long as it has no Pokémon Tools attached to it. You can’t apply more than 1 Majestic Style Ability at a time.
In the aesthetics department, for the Trainers, you may like to lessen the holosheet prominence, as at the moment you can't really see the art. If possible, you should actually remove any holosheet that overlaps the mega stone itself, like you would if the holosheet is on a Pokemon.
(This probably ain't everything, but hey, I'm lazy. :x)