They are: Pikachu (Base Set, 1999) Charizard (Base Set, 1999) Misty (Gym Heroes, 2000) Erika's Jigglypuff (Gym Heroes, 2000) Sneasel (Neo Genesis, 2000) Shining Celebi (Neo Destiny, 2002) Lugia (Aquapolis, 2003) Delcatty (EX Ruby & Sapphire, 2003) Dark Tyranitar (EX Team Rocket Returns, 2004) Scizor ex (EX Unseen Forces, 2005) Metagross (EX Delta Species, 2005) Palkia lv.X (Great Encounters, 2008) Uxie (Legends Awakened, 2008) Crobat G (Platinum, 2009) Gengar 'Prime' (Triumphant, 2010) Darkrai & Cressalia LEGEND (Triumphant, 2010) N (Noble Victories, 2011) Rayquaza EX (Dragons Exalted, 2012) Genesect EX (Plasma Blast, 2013) Mega Gardevoir EX (Primal Clash, 2015) Greninja BREAK (BREAKpoint, 2016) Solgaleo GX (Sun & Moon, 2017) Buzzwole GX (Crimson Invasion, 2017) Pikachu & Zekrom GX (Team Up, 2019) Zacian V (Sword & Shield, 2020) Raikou (Vivid Voltage, 2020) Mew VMAX (Fusion Strike, 2021) Arceus VSTAR (Brilliant Stars, 2022) Magikarp (Paldea Evolved, 2023) When we look at the list as a whole, it's interesting that Pokmon decided not to include one card from each year, but instead put a little extra focus on certain points and notable Pokmon sets from the game's history

Cards that look better can easily become cards that fare better in rounds
Fandaniel, Telophoroi Ascian Fandaniel, Telophoroi Ascian is easy to trigger and has a great end step trigger that adds up to a lot of pain for opponents
Due to her Phyrexian mana, you can technically play Spike in any Unstable build