Description, catalog fields, rules text, and how it plays—in one place.
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Choose 1 of your Basic Pokémon in play. Search your deck for a Basic Pokémon and switch it with that Pokémon. (Any attached cards, damage counters, Special Conditions, turns in play, and any other effects remain on the new Pokémon.) Shuffle the first Pokémon into your deck. You may play only 1 Supporter card during your turn (before your attack).
Abilities, attacks, weakness & resistance
Other cards from Steam Siege
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Volcanion-EX (Holofoil)
Professor Sycamore (Holofoil)
Pokémon Ranger (Holofoil)
M Gardevoir-EX (Holofoil)
Gardevoir-EX (Holofoil)
Magearna-EX (Holofoil)
M Steelix-EX (Holofoil)
Steelix-EX (Holofoil)
Volcanion-EX (Holofoil)
Steelix Spirit Link (Reverse Holofoil)
Steelix Spirit Link
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Ninja Boy (xy11-103 Staff Stamp) is a Trainer—Supporter from the Steam Siege set. It lets you pick one of your Basic Pokémon in play and swap it with a Basic Pokémon searched from your deck, keeping attached cards, damage, Special Conditions, and other effects on the incoming Pokémon. This card is constrained by the game rule that you may play only one Supporter per turn, so its timing must be chosen strategically.
Catalog pricing data as of 20 Apr 2026, 10:40