Slowking: Neo Genesis 14/111 (with Dark Explorers 49/108 as close second; I like the artwork where Slowking is in its signature pose with its hands behind its back)
Misdreavus: Legendary Treasures 57/113
Unown: Lost Thunder 90/214 (with Lost Thunder 91/214 as close second; I like the colors of the second more, but the first shows Unown at their natural habitat in close proximity to a temple, and I also like the art-style slightly more - the Alph Lithograph cards with the full Unown alphabet are also not bad)
Wobbuffet: Japanese Ash vs Team Rocket Deck Kit - Team Rocket Half Deck 008/026 (having seen the full anime, this is just an iconic display of Wobbuffet 
)
Girafarig: EX Dragon 16/97
Pineco: Flashfire 4/106
Foretress: Undaunted 13/90 (I can’t say I like any of the Foretress artworks. I don’t hate any either, but there isn’t any artwork I really like for Fortress. Of course it isn’t a too interesting Pokémon to display, but still… 
)
Dunsparce: Japanese Rampardos the Attacker Deck DPBP#262
Gligar: Phantom Forces 46/119
Steelix: Stormfront 28/100
Snubbull: Kalos Starter Set 22/39
Granbull: Lost Thunder 138/214
Qwilfish: Shining Legends 21/73
Scizor: Undaunted 7/90 (with Lost Thunder 126/214 as a very close second)
Shuckle: Japanese Legendary Heartbeat 036/076
Heracross: Boundaries Crossed 8/149
Sneasel: Burning Shadows 85/147
Teddiursa: BREAKthrough 121/162
Greetz,
Quuador