How much is a PSA 10 graded version of this card worth?

A PSA 10 graded Slowpoke [Master Ball] #18 is currently valued at $115.

Where can I find this card?

This card is available in the Pokémon Prismatic Evolutions set on our marketplace.

Slowpoke [Master Ball] #18 — Pokémon Prismatic Evolutions Card Value

Pokémon Prismatic Evolutions

What the Slowpoke [Master Ball] #18 card from Pokémon Prismatic Evolutions is worth — ungraded and graded (PSA 10).

Slowpoke [Master Ball] #18 value — Ungraded $6 · Grade 9 $18 · PSA 10 $115. Prices updated July 2026.

Set · Pokémon Prismatic EvolutionsGame · Pokémon

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Value by grade

Ungraded

3.0×

$18

Grade 9

19.2×

$115

PSA 10

Real sold prices per grade — the PSA 10 premium on this card is 19.2× raw.

Complete-in-box price history

Monthly CIB value, based on sold comps.

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Which version do you have?

For the cheapest way to own Slowpoke #18, grab the Poke Ball or Reverse version for only $1. The Master Ball at $6 offers a clear premium, likely due to a special edition or higher demand. If you are a casual collector, stick to the $1 options. Serious collectors seeking the most desirable version should invest in the Master Ball to showcase the item's perceived value.

VersionUsedNewBuy

Master Ball— this pageSlowpoke [Master Ball] #18 — Pokémon Prismatic Evolutions Card Value$6$115.01eBay ↗

Poke BallSlowpoke [Poke Ball] #18 — Pokémon Prismatic Evolutions Card Value$1.28$94.95eBay ↗

ReverseSlowpoke [Reverse] #18 — Pokémon Prismatic Evolutions Card Value$1.25$34.27eBay ↗

StandardSlowpoke #18 — Pokémon Prismatic Evolutions Card Value$1.2$136.38eBay ↗

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PriceCharting — Slowpoke [Master Ball] #18 (Pokémon Prismatic Evolutions)$6

Item details

Brand: Pokémon
Set: Pokémon Prismatic Evolutions
Game: Pokémon

Slowpoke [Master Ball] #18 (Pokémon Prismatic Evolutions) card value

An ungraded Slowpoke [Master Ball] #18 from Pokémon Prismatic Evolutions averages around $6. A Grade 9 copy runs about $18, and a PSA 10 gem-mint commands $115.

What drives the price

Centering, corners, edges, and surface decide a card's grade — and the grade decides the price. The jump from raw to PSA 10 can be 5–20×, so condition is everything. Holos, first editions, and shadowless prints carry the biggest premiums.

Price guide

Sold values by grade vs. what sellers ask today

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Condition	Value	Based on
Ungraded	$6	eBay sold comps
Grade 9	$18	eBay sold comps
PSA 10	$115	eBay sold comps

Frequently asked questions

What is the starting price for an ungraded Slowpoke [Master Ball] #18?: An ungraded Slowpoke [Master Ball] #18 from Pokémon Prismatic Evolutions is listed for $6.
How much is a PSA 10 graded version of this card worth?: A PSA 10 graded Slowpoke [Master Ball] #18 is currently valued at $115.
Where can I find this card?: This card is available in the Pokémon Prismatic Evolutions set on our marketplace.