Magikarp & Wailord GX #SM166 value & price
Reviewed by Mumbles · Updated 4 Aug 2026Related Magikarp & Wailord GX #SM166 & chase cards
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Magikarp & Wailord GX #SM166 is one of those promo cards that makes people smile the moment they see it, a big lovable Wailord towering over a tiny Magikarp, straight from the Pokemon Promo set. It's not flashy in a rainbow-foil way, but the tag team GX mechanic and that oddball pairing have made it a genuine favorite among collectors chasing nostalgia as much as value. If you're trying to pin down Magikarp & Wailord GX #SM166 value, the short answer is that it ranges widely depending on condition, and that's exactly what we're going to unpack here.
Price history
InteractiveRaw value is $56, up 40% over the past year, with an all-time high of $76 in July 2026.
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Magikarp & Wailord GX #SM166 price at every grade
Market value at each grade, with how many exist (population). 1,247 graded, only 10 are PSA 10.
| Grade | Value | Population |
|---|---|---|
| PSA 10 (Gem Mint) | $37k | 10 |
| PSA 9 | $2.1k | 160 |
| PSA 8 | $264 | 508 |
| PSA 7 | $156 | 344 |
| PSA 6 | $75 | 124 |
| PSA 5 | $60 | 41 |
| PSA 4 | $51 | 25 |
| PSA 3 | $43 | 11 |
| PSA 2 | $39 | 9 |
| PSA 1 | $176 | 15 |
| Raw / Ungraded | $56 | - |
Prices & population from PriceCharting. Value shown is the PSA-grade market price; population is split by grading company.
Card details
- Set
- Promo
- Rarity
- Promo
- Type
- Water
- HP
- 300
- Weakness
- Grass ×2
- Retreat cost
- 4
- Illustrator
- Mitsuhiro Arita
- Released
- 2017
Attacks
- Super Splash180Water · Water · Water · Water · Water
- Towering Splash GX10Water
If this Pokémon has at least 7 extra Water Energy attached to it (in addition to this attack’s cost), this attack does 100 damage to each of your opponent’s Benched Pokémon. (Don’t apply Weakness and Resistance for Benched Pokémon.) (You can’t use more than 1 GX attack in a game.)
- 10Water
Where to pull Magikarp & Wailord GX #SM166
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The collector's take on Magikarp & Wailord GX #SM166
Is Magikarp & Wailord GX #SM166 worth grading?
Here's where the numbers get interesting. A raw, ungraded Magikarp & Wailord GX #SM166 sits around $67, which is a fair price for a fun promo to keep in a binder. But send that same card off and land a PSA 10, and you're looking at $37,210, a jump of roughly 551.7 times the raw value. Even a Grade 9, which sounds close to perfect, only brings $2,022, showing just how much the market rewards true gem mint condition over anything slightly short of it. That gap tells you two things: grading can pay off in a big way if your copy is flawless, but hitting a 10 is genuinely hard, and grading fees plus the wait time are real costs even if your card comes back a 9. If your raw copy has sharp corners, clean edges and centering that looks dead-on to your eye, it's worth considering. If it's got any soft spots, you might be better off enjoying it raw and saving the grading budget for a cleaner pull.
How rare is Magikarp & Wailord GX #SM166?
As a promo card, Magikarp & Wailord GX #SM166 already carries a certain built-in scarcity, promos tend to have smaller, more controlled print runs than mainline set cards, and that scarcity only tightens as you climb the grading ladder. We don't have exact population figures to share here, but the massive spread between the $67 raw price and the $37,210 PSA 10 price is itself a strong clue that gem mint copies are genuinely uncommon. When a card's high grade sits at over 550 times its raw value, it usually means very few copies have made it through grading in flawless shape, and that scarcity is a big part of what keeps the price elevated for the top tier.
Where can you pull Magikarp & Wailord GX #SM166?
This is where PackSpy's data earns its keep. We've recorded Magikarp & Wailord GX #SM166 pulled 200 or more times across sites including mnstr, packs, courtyard and collector-crypt, so it's not some mythical chase card you'll never see, it does turn up. The biggest recorded pull we've tracked for it came in at $4,650, which gives you a real sense of what a great pull can look like in practice, not just on paper. Collectors have spotted it in packs like Pack 2, XY Evolutions, Pokemon: The Amazing Chase Day 5, Pokémon Master Pack and Pokémon Starter Pack, though it's worth remembering that opening packs is ultimately a gamble, and most rips won't come close to matching that top pull. Still, if you like the thrill of the chase, those are the packs where this card has actually shown up in real, recorded rips, not just rumor.
Questions people ask
How much is Magikarp & Wailord GX #SM166 worth?+
A raw, ungraded copy is valued around $67, while a Grade 9 climbs to $2,022 and a PSA 10 reaches $37,210. The condition of the card makes a massive difference here, so where yours falls on that scale really shapes the price.
Is Magikarp & Wailord GX #SM166 worth grading?+
It can be, especially since a PSA 10 is worth about 551.7 times the raw price. But gem mint copies are tough to pull off, and grading takes time and money, so it's really only worth it if your raw card is already in excellent shape.
What set is Magikarp & Wailord GX #SM166 from?+
It comes from the Pokemon Promo set, which is why it carries that special SM166 promo numbering rather than a standard set number. Promo cards like this one often have smaller print runs, which adds to their appeal.
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Mumbles built PackSpy so pack-opening data would not be a guessing game. We track real pulls and live card prices across the top pack sites and show what is actually happening, no hype, just the numbers. Every price and population figure here is pulled from live market data. More about Mumbles.
Open a pack that holds Magikarp & Wailord GX #SM166
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