Steam Siege is a set in the XY series. It was released on August 3, 2016. The printed size is 114. This checklist is longer, at 116 cards. Ninja Boy is 103/114, in position 103 of 116 on this checklist. Before it is 102 Greedy Dice, and after it is 104 Pokémon Ranger. The listed rarity is Uncommon.
Ninja Boy is a Trainer card. The listed subtypes are Supporter.
Megumi Mizutani illustrated this card. The same name is on 133 other cards in the catalog.
The card text says: 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. The card text says: You may play only 1 Supporter card during your turn (before your attack).
I keep a set binder for Steam Siege, meant to hold every card of that set. This card is one slot in the Steam Siege set binder. I still need this card.
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).
Steam Siege, in the XY series. It was released on August 3, 2016. The printed size is 114.
103/114. It is entry 103 of 116 in this checklist.
Megumi Mizutani. The catalog lists 133 other cards with that illustrator.
Uncommon.