Shiny Vaults, Baby Shinies & Secret Rares: The Weird Corners of Rarity

Every collector eventually meets a card that does not fit the normal rules — a number bigger than the set size, a sparkle pattern nothing else in the set has, a gold Energy that seems to have wandered in from another game. Welcome to the strange end of rarity. The Pokémon shiny vault, secret rares, gold cards and rainbow finishes form a parallel world of chase cards with their own logic, their own eras and some genuinely odd pricing.

This guide untangles it: what the Shiny Vault actually was, how secret rares have evolved era by era, why some ‘ultra rare’ cards stay stubbornly cheap, and which overlooked corners quietly reward collectors who know what they are looking at.

What the Pokémon Shiny Vault actually was

The Shiny Vault was a special subset attached to the Sun & Moon era sets Hidden Fates (2019) and Shining Fates (2021). Mechanically, Shiny Vault cards were numbered outside the main set with an SV prefix — SV1, SV2 and so on — and featured Shiny Pokémon: the alternate colourations fans know from the video games, printed on a distinctive sparkle-foil background.

Two things made the Vault special. First, concentration: an entire subset devoted to Shinies, including fan favourites like Charizard, made both sets event releases. Second, the affectionate nickname ‘baby shinies’ — the Vault’s regular-sized Shiny Pokémon on that sparkle background, beloved for looking adorable rather than imposing. Hidden Fates in particular became one of the most sought-after modern sets, with its Shiny Charizard-GX still an icon of the era. The concept later echoed in Scarlet & Violet’s Paldean Fates, which revived the shiny-subset formula for a new generation. For full checklists of these subsets, Bulbapedia remains the reference we reach for.

It is worth understanding why the Vault sets hit so hard commercially. Neither Hidden Fates nor Shining Fates was a standard expansion — both were special sets sold only through products like tins, pin collections and Elite Trainer Boxes rather than ordinary booster boxes. That distribution model concentrated demand onto a handful of products, and Hidden Fates ETBs in particular became notorious for selling out and reappearing at multiples of RRP. The lesson stuck: when a beloved subset meets a restricted product line, scarcity does the rest.

Secret rares through the eras

A secret rare is simply a card whose collector number exceeds the printed set size — card 195/185, say. The ‘secret’ is that the set contains more cards than the box tells you. What fills those secret slots has changed dramatically over time:

If you want the full modern ladder — illustration rares, SIRs and friends — our guide to alt arts and Special Illustration Rares picks up exactly where this one leaves off.

Gold cards, rainbows and textures

The finishes themselves tell you a lot about desirability. Gold cards — Pokémon, items and Energies rendered in etched gold foil — have been the traditional summit of a set’s rarity ladder, and the texture work on modern gold hyper rares is genuinely lovely in hand. Rainbow rares divided opinion from day one: some collectors adored the pastel wash, others felt it flattened the artwork, and that split personality still shows in their prices. Textured finishes — the embossed patterning on modern ultra rares and SIRs — are now arguably the biggest driver of that premium feel, which is why texture differences are among the first things checked when authenticating high-end cards.

Handling these finishes teaches you things photographs cannot. Gold etching catches light differently from rainbow gloss; textured SIR embossing follows the artwork’s contours rather than a generic pattern; sparkle foil from the Pokémon Shiny Vault era has a granular glitter quite unlike standard holofoil. Spend time with genuine examples of each and you will develop the collector’s most useful sense — the instant, wordless feeling that a card in your hand is right or wrong — which pays off every time you buy raw high-end cards.

Why some secret rares stay cheap

Here is the counterintuitive part: plenty of secret rares are worth less than common-looking cards from the same set. A few reasons why:

• Rarity without demand is just scarcity. A gold Energy is technically among a set’s rarest cards, but few people are passionate about Energy cards. Price follows want, not odds — the same lesson from our look at Master Ball reverses, where demand for particular Pokémon dwarfs the maths of the odds.
• Bloat diluted prestige. When a set has dozens of secrets, being ‘secret’ stops meaning much. Sword & Shield era rainbows of mid-tier Pokémon often sit at very modest prices at the time of writing.
• Character is king. The same finish on Charizard and on a forgettable mid-evolution can differ in price by two orders of magnitude. The finish decorates; the Pokémon sells.

The flipside is also true: when demand does arrive, thin supply makes these corners move fast. A secret rare nobody wanted for years can double on a single wave of nostalgia, precisely because so few copies were ever pulled and even fewer were kept nice.

Hidden gems worth watching

The fun of the weird corners is that inattention creates opportunity. Unpopular-era rainbows of genuinely beloved characters, gold items with unique artwork, early Pokémon Shiny Vault pulls of Pokémon that later got popular, oddball secret Trainers with striking art — these are the cards that drift along cheaply until the hobby’s attention circles back. We would never promise any card will rise, and buying purely to speculate is a mug’s game; but if a strange old secret rare makes you smile, cheerful obscurity is exactly the right time to add it to the binder.

Frequently asked questions

The takeaway: the weird corners of rarity reward knowledge, not budget — know what the SV numbering means, why finishes matter and where demand actually lives, and you will spot value everyone else scrolls past. New sets keep adding strange treasures, and we stock them from day one — have a browse of the latest Pokémon range and see what oddities catch your eye.