Core cards
Pokemon
Naganadel GX FLI 56: Use its stinger attack to make it so that both you and your opponent have 3 prize cards to make the game a lot quicker.
Iron Hands ex PAR 70: Use its Amp You Very Much attack when once you have 3 prize cards left, you can get very close to winning the game (or just win the game there)
Iron Crown ex TEF 81: Its Cobalt Command ability to boost Iron Hands' damage to knock out your opponent's pokemon
Miraidon TEF 121: energy acceleration for Iron Hands
Arceus ◇ FLI 96: Energy acceleration for iron hands, Naganadel GX, and Unown V. Just don't let it die.
Unown V SIT 65: If you knocked out a single prizer with Iron Hands after using Naganadel GX's stinger attack, you can use Unown V's victory symbol attack to win the game.
Trainers
Maximum Belt TEF 154: Damage boost for Iron Hands
Ultra Space FLI 115: Search for Naganadel GX and Poipole