Japanese cards are often better centered, less prone to factory defects, and more stable in terms of quality control
Gardevoir is primarily there to power up other Psychic-type Pokemon like Mewtwo ex
Under infrared lighting, the yellow and red dots that make up the printing of the background of the card fade away, and the structure of the card stock and the black ink can be seen

Sort Rarity Card Type Bellsprout #1Common $0.12 Weepinbell #2Uncommon $0.20 Victreebel #3Rare $0.26 Cacnea #4Common $0.11 Cacturne #5Uncommon $0.17 Kricketune V #6Ultra Rare $0.61 Cherubi #7Common $0.14 Cherrim #8Holo Rare $1.04 Carnivine #9Uncommon $0.15 Durant #10Uncommon $0.19 Scatterbug #11Common $0.09 Spewpa #12Uncommon $0.13 Vivillon #13Rare $0.21 Fomantis #14Common $0.14 Lurantis #15Rare $0.22 Tapu Bulu #16Holo Rare $0.38 Blipbug #17Common $0.09 Flapple V #18Ultra Rare $0.89 Flapple VMAX #19Ultra Rare $2.37 Entei #20Holo Rare $0.39 Victini V #21Ultra Rare $1.08 Victini VMAX #22Ultra Rare $3.22 Tepig #23Common $0.14 Pignite #24Uncommon $0.14 Emboar #25Holo Rare $0.37 Heatmor #26Uncommon $0.04 Salandit #27Common $0.26 Salazzle #28Rare $0.22 Sizzlipede #29Common $0.26 Centiskorch #30Rare $0.21 Horsea #31Common $0.15 Seadra #32Uncommon $0.15 Kingdra #33Holo Rare $0.35 Galarian Mr
For rare chase cards, explore our Pokmon modern chase card guide
Most modern cards follow a predictable pattern: prices spike at release, drop over the following weeks as supply increases, stabilize, and then either gradually decline or (for chase cards) slowly climb as sealed product dries up