Lucario & Melmetal GX - 083/173 - SM12a: TAG TEAM GX: Tag All Stars

The Japanese Pokémon card 083/173 is Lucario & Melmetal GX from the 2019 Tag Team GX: Tag All Stars high-class pack (SM12a). This Metal-type Basic Pokémon card (RR rarity) features 260 HP, a 3-retreat cost, fire weakness, and psychic resistance. It is highly regarded for its durable, defensive "Full Metal Wall GX" attack. 
Key Features & Abilities:
Set: Tag All Stars (SM12a) #083/173
Type: Metal
HP: 260
Attack 1: Steel Fist (50 damage)
Attack 2: Heavy Impact (150 damage)
GX Attack: Full Metal Wall GX – For the rest of the game, your Metal Pokémon take 30 less damage from opponent's attacks. If this Pokémon has 1 extra energy attached, discard all energy from the opponent's active Pokémon. 
The card is known for its holographic finish, often listed as "Double Rare" (RR) or "Ultra Rare" in Japanese, featuring both characters.