Dedenne: BREAKthrough 57/162 (Dedenne has a lot of great artworks (I can see why you like it so much @dizzle24 ), but the one from BREAKthrough is my favorite, with the Unified Minds 145/236 as close second)
Carbink: Fates Collide 50/124
Goomy: Japanese XY-P Art Academy promo
Sliggoo: Ancient Origins 59/98
Goodra: Ancient Origins 60/98
Klefki: Furious Fists 73/111 (usually not a big fan of 5ban Graphics, but it actually suits this Pokémon pretty well)
Phantum: Guardians Rising 6/145 (I used to collect Mimikyu including cameos, so I’ve liked this artwork for a while - the Rebel Clash 014/192 artwork is a close second, though)
Trevenant: Guardians Rising 7/145
Pumpkaboo: XY 56/146 (only three artworks to choose from…)
Ghourgeist: Japanese XY-P Art Academy promo (this was a no brainer - this artwork is amazing!)
Bergmite: Japanese Silver Lance 025/070 (only four artworks to choose from, but all four are decent)
Avalugg: Japanese Silver Lance 026/070
Noibat: Forbidden Light 100/131
Noivern: Japanese Skyscraping Perfection 074/067
Xerneas: Crimson Invasion 73/111 (with BREAKthrough 107/162 as close second)
Yveltal: Japanese Dark Order 030/052 (it’s also released in the English Team Up set, but I like this artwork more with the Japanese holofoil pattern - XY150a promo and Steam Siege 65/114 are a close second and third)
Zygarde Cell: no TCG cards available with Zygarde Cell
Zygarde Core: Fates Collide 108/124 Power Memory
Zygarde 10% Forme: Fates Collide 52/124
Zygarde 50% Forme: Forbidden Light 72/131
Zygarde Complete Forme: SM15 Promo (I didn’t liked any of its artworks tbh…)
Diancie: Generations - Radiant Collection RC22/RC32
), but the one from BREAKthrough is my favorite, with the 
