This attack does 50 damage times the amount of Energy attached to all of your opponent's Pokémon. (You can't use more than 1 GX attack in a game.)
For Tapu Koko-GX in SM Black Star Promos, the current reference price is $1.74. Price action is stable over 7 days, moving only 0.0%.
It now sits 2.2% above its 30-day average of $1.70. In the past 90 days, observed prices ranged from $1.48 to $1.74 (15% spread), a low-volatility profile.
The listed rarity for this print is Promo.
Collector-focused market read: Over the last 7 days, prices have remained stable at 0.0%, indicating a consolidation phase over sudden breakouts. With a 15% 90-day spread ($1.48-$1.74), this card currently tracks as low-volatility.
Current value remains close to its 30-day mean ($1.70). Top-grade copies show substantial separation from raw: PSA 10 is pricing +7084% above the current raw benchmark.
PSA 9 is currently around $29.97, while PSA 10 is $125.00.
Tapu Koko-GX appears in SM Black Star Promos, released in 2017. Its card type is Pokémon.
The rarity label is Promo. Printed HP is 170.
Energy typing is Lightning. Card subtype classification is Basic and GX.
Card rules text: Pokémon-GX rule: When your Pokémon-GX is Knocked Out, your opponent takes 2 Prize cards. This card has the following ability: "Aero Trail".
Tapu Koko-GX sits within a broader pool of Tapu variants that can be compared by set, rarity, and price. The current sample spans 5 comparable cards from 3 sets.
In this sample, pricing ranges between $1.70 and $15.85 (832% total span). Relative to the alternative average ($7.60), this card is -77%.
Notable alternatives include Tapu Koko-GX #SM33 (SM Black Star Promos) at $1.88, Tapu Koko-GX #SV93 (Hidden Fates Shiny Vault) at $15.85, Tapu Koko-GX #153 (Guardians Rising) at $13.68, and Tapu Koko-GX #47 (Guardians Rising) at $1.70.
SM Black Star Promos was released in 2017. It belongs to the Sun & Moon series.
Set size is 250 cards, which categorizes SM Black Star Promos as large. As of 2026, the set is 9 years old and now falls into an established back-catalog period.
In the SM Black Star Promos checklist, Tapu Koko-GX occupies position #SM50 as a Promo card.
