Ninja Boy 103/114
Supporter card from Steam Siege · released Aug 3, 2016
Ninja Boy is an Uncommon Supporter card, number 103/114 in Steam Siege (released Aug 3, 2016), illustrated by Megumi Mizutani. Its TCGplayer market price was ~$0.43 for the reverse holofoil finish on Oct 30, 2026. Between Oct 1 and Oct 30, 2026, its Reverse Holofoil TCGplayer market price went from ~$0.41 to ~$0.43, up $0.02.
Prices by finish
| Finish | PriceMarket price | Low | Mid | Buy |
|---|---|---|---|---|
| Normal | ~$0.16 | ~$0.03 | ~$0.20 | CardNexuseBayBuy Normal on TCGplayer (opens in a new tab)Search eBaySearch AmazonCardNexus |
| Reverse Holofoil | ~$0.43 | ~$0.15 | ~$0.41 | CardNexuseBayBuy Reverse Holofoil on TCGplayer (opens in a new tab)Search eBaySearch AmazonCardNexus |
TCGplayer market prices per finish, as of Oct 30, 2026. A guide, not an appraisal; condition and grading change real-world value. Buy links are affiliate links.
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Sealed Steam Siege products
TCGplayer market prices (via TCGCSV), Oct 30, 2026.
![Steam Siege Sleeved Booster Pack Art Bundle [Set of 4]](https://static.pokemoncardlist.net/images/cards/sealed-276599.avif)
Sleeved Booster Pack Art Bundle [Set of 4]~$138.32Buy on CardNexusSearch eBayBuy on TCGplayer Steam Siege Sleeved Booster Pack Art Bundle [Set of 4] (opens in a new tab)Search eBaySearch AmazonCardNexus
Card details
| Set | Steam Siege |
| Number | 103/114 |
| Rarity | Uncommon |
| Artist | Megumi Mizutani |
| Format legality | Expanded |
| Finishes | Normal · Reverse Holofoil |
What the codes mean
- Card number103/114Card 103 of the 114 in the main Steam Siege list.
- Set symbol
The small Steam Siege symbol identifies the set. Cards from before Scarlet & Violet print a symbol instead of a set code. - Regulation markNo regulation mark. Cards before Sword & Shield (2020) have none.
- RarityUncommon: a black diamond.
- Illustrator“Illus. Megumi Mizutani” names the artist who made the art.
Card text
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.
More Steam Siege cards
Card data via TCGdex and pokemontcg.io, updated Oct 30, 2026. Prices: TCGplayer market prices via TCGCSV, Oct 30, 2026.