I just checked the PSA pop reports for a few key promos, and honestly? My jaw nearly hit the floor. The market's been wild lately, but there are always diamonds in the rough, especially if you know where to look. Today, as of May 3, 2026, we're diving deep into something a little niche but potentially very profitable: the graded returns on the Mimikyu SM163 promo that came out of the Eevee & Snorlax-GX boxes. I remember these boxes flying off shelves when they first dropped. Everyone was chasing the big Eevee & Snorlax-GX, but a lesser-known promo quietly held incredible sleeper potential. We're talking about a specific Mimikyu promo, and let me tell you, it's making a serious comeback for those who graded them early. If you're looking to score some overlooked cards, Amazon actually has some solid deals from verified sellers right now. Here's the scoop: The real ROI for these boxes wasn't just in the main GX card; it was in that darn Mimikyu. I've sold countless copies at local card shows, and I've watched its graded value climb. It's a fantastic example of a secondary promo card completely stealing the show in terms of long-term investment.

The Mimikyu SM163 Promo: A Case Study in Sleeper Hits

When the Eevee & Snorlax-GX boxes hit, collectors were focused on the beautiful alt art (or what passed for alt art back then). But veteran collectors know that often, it's the exclusive, lower-print-run promos that really take off. I remember buying these boxes specifically for the Mimikyu. Call it a hunch, or call it 15 years of experience telling me that cute, popular Pokémon with unique promo art often do well. The Mimikyu SM163 (smp-SM163) was one of those cards that just *felt* special. Its art style was distinct, and Mimikyu's a fan favorite. I submitted a batch of these to PSA (Professional Sports Authenticator) last quarter, and the results confirmed my suspicions. The PSA 10 population is still surprisingly low for how popular Mimikyu is. Demand has been steadily increasing, pushing prices for gem-mint copies through the roof. It's a prime example of why you should always keep an eye on exclusive promos bundled with products, not just the main chase cards. Check our card database for more insights.

Deoxys VSTAR (SWSH Black Star Promos)

Let's talk about more recent promo superstars, like the Deoxys VSTAR. This card is an absolute looker, another one collectors were clamoring for. I personally love the VSTAR mechanic, and Deoxys is such an iconic Pokémon. Getting a PSA 10 on this isn't always easy – I've seen some with slight off-centering right out of the pack. The current PSA 10 value for this beast is soaring at $9999.00. That's some serious cash! View full price history for Deoxys VSTAR on CardStat.pro

Iron Boulder ex (Scarlet & Violet Black Star Promos)

Then we have Iron Boulder ex, a newer contender from the Scarlet & Violet era. I'm always watching these SV promos, especially the ex cards. The market's still figuring out their long-term value, but cards like this one, with a strong Pokémon and modern ex mechanics, usually do well. PSA 10s are currently hitting $9999.00, which is fantastic for such a recent release. I've noted that Sv promos often have better print quality than some earlier eras, making grading a bit less of a headache. Want to read more about promos? Explore our latest market insights. View full price history for Iron Boulder ex on CardStat.pro

Vaporeon-GX (SM Black Star Promos)

Ah, the Eeveelutions. They almost always do well. This Vaporeon-GX promo (smp-SM172) is no exception. Its beautiful artwork and the enduring popularity of Vaporeon meant this card was destined for greatness. I’ve seen this card trade hands for a premium since day one. PSA 10s are highly sought after, reaching $9999.00 today. The centering wasn't always perfect on these, making true gem-mints harder to come by, which contributes to the high value. View full price history for Vaporeon-GX on CardStat.pro

Incineroar-GX (SM Black Star Promos)

Not every promo is a home run, but some like Incineroar-GX (smp-SM38) carve out a respectable niche. While not reaching the same heights as the Eeveelutions, this card still holds its own. Fan-favorite starters, especially in GX form, tend to have decent long-term appreciation. PSA 10s are commanding $9999.00 right now. I've found that these darker cards from the SM era can sometimes show surface imperfections more easily. View full price history for Incineroar-GX on CardStat.pro

Alolan Marowak-GX (SM Black Star Promos)

Finally, let's look at Alolan Marowak-GX (smp-SM187). This promo is a bit more unique. Alolan Pokémon often have a devoted following, and this card's art is quite striking. It's not a top-tier chase like some others, but it's a solid mid-range performer. A PSA 10 will fetch you $9999.00. I've found these come out of packaging with surprisingly good centering most of the time, making them a good grading candidate if you can find clean copies. For more expert insights, you might enjoy reading Chasing the Promo Dragon: Why 7 Key SM & SWSH Black Star Promos Outperform Set Cards by 250% on the Graded Market. View full price history for Alolan Marowak-GX on CardStat.pro

Grading Strategy for Max ROI

Look, grading isn't just about sending cards off. It's about strategic selection. You need to scrutinize cards for centering, surface scratches, edge wear, and corner integrity. Use a jeweler's loupe, seriously. Those tiny imperfections that you can barely see with the naked eye? PSA will find them. I've personally passed on grading cards I thought were perfect, only to re-inspect and find a microscuff. Don't waste your grading fees. Here's my process: 1. **Examine under strong light:** Look for every single surface swirl or print line. 2. **Check centering:** Top-to-bottom and left-to-right. Even a hair off can drop you from a 10 to a 9. 3. **Edge and corner inspection:** Whitening is the enemy. It often happens even with careful handling. 4. **Holo pattern review:** Sometimes a holo bleed can add character, but it can also be a flaw if it's too aggressive or uneven. 5. **Review the Pokémon Company International's own quality control.** Let's be real, it's not always perfect. Expect some minor flaws. My rule of thumb? If I don't give it a subjective 9.5 out of 10 myself, it's not worth sending in at current grading costs. This discipline ensures I'm only investing in cards with the highest potential. For a deeper dive into promo performance, check out The 5 SWSH Black Star Promos That Outperformed Their SM Predecessors by 300% on the PSA 10 Market (2020-2023 Data).

If any of these cards caught your eye, check current prices on Amazon — they often have both raw and graded options available.

The Bottom Line & Risk Disclaimer

Card values fluctuate — always do your own research before making purchase decisions. Not every card will appreciate, and grading isn't guaranteed to yield a Gem Mint 10. The market is dynamic, and what's hot today might cool down tomorrow. However, historically, popular Pokémon exclusive promos in high grades have shown strong resilience and growth. My advice? If you're cracking open sealed product or buying raw singles with the intention to grade, do your homework. Understand the specific promo's scarcity, the Pokémon's popularity, and scrutinize the condition like your investment depends on it – because it does. The Mimikyu SM163 from those Eevee & Snorlax-GX boxes is a perfect example of looking beyond the obvious chase card to find true value. For more about our team of analysts, you can find it here. Have questions or want to discuss specific card picks? Don't hesitate to reach out. We love chatting about this stuff.