Mega Steelix ex Deck

Mega Steelix ex wins by activating Adamantine Rolling to deal 120 damage while gaining damage reduction and Weakness immunity for the opponent's next turn, creating a near-unkillable tank that the opponent must spend multiple turns dismantling. Knocking out Mega Steelix ex awards the opponent 3 points — an instant win — so the primary goal is to never let that happen.

Open by searching Onix with Poké Ball and developing the bench with Indeedee ex. Brock provides energy acceleration so Mega Steelix ex can fire Adamantine Rolling — which costs four energy — as early as possible. Use Pokémon Center Lady and Lucky Ice Pop to heal between turns, so the damage reduction from Adamantine Rolling combines with active healing to make Mega Steelix ex virtually unkillable while active. Cyrus and the singleton Copycat manage hand quality and target selection, while Heavy Helmet punishes opponent attackers that swing into your board.