How Many Packs to Pull Eevee from Twilight Masquerade
| Card | Eevee — Twilight Masquerade #188 |
|---|---|
| Rarity tier | Illustration Rare |
| Per-pack odds | 1 in 378 |
| Expected packs to pull | 378 |
| 50% confidence band | 262 packs |
| 95% confidence band | 1,130 packs |
| TCGplayer market | $91.49 |
| Pack-rip break-even | 18 packs @ $5 |
Eevee chase methodology
| Formula | Specific-card odds = Illustration Rare tier rate (5.56%) ÷ 21 cards; confidence bands solve 1 - (1 - p)^N. |
|---|---|
| Assumptions | Independent pack rolls, uniform selection within the rarity tier, no pity timers, no box mapping, no first-edition/condition split, no duplicate protection. |
| Data source | Card identity and rarity from the bundled Pokemon TCG API catalog; pull-rate constants from the live simulator; market price from the bundled TCGplayer snapshot. |
| Update cadence | Regenerated by prerender; price values update when the TCGplayer snapshot is refreshed through the data pipeline. |
| Limitations | The page estimates probability and raw market cost only; it does not model grading premiums, counterfeit risk, sealed-product appreciation, or individual print-run collation. |
This page answers exactly one question: how many Twilight Masquerade booster packs does it take to pull Eevee #188? The numbers below come from the same per-rarity pull-rate model the PackRip Twilight Masquerade simulator runs on, mirrored from packGenerator.ts. TCGplayer pricing refreshes every build, so the buy-vs-rip verdict at the bottom reflects current market.
The math: ~1 in 378 per pack
Eevee sits in the Illustration Rare rare-slot pool for Twilight Masquerade. There are 21 Illustration Rare cards in the Twilight Masquerade pool, and the Illustration Rare slot fires with probability 5.56% per pack. Since the slot is split evenly across the 21 cards in that tier, the per-pack chance of pulling this specific card is 1 in 378 — approximately 1 in 378.
Pulls are independent and identically distributed, so the number of packs until you hit Eevee follows a geometric distribution with parameter p = 0.002648. The expected number of packs is 1/p — that's ~378 packs on average. But "average" hides huge variance: the median pull lands faster than the mean (~262 packs at 50% confidence), and a long unlucky tail can stretch the wait dramatically. The 95% confidence band — 1,130 packs — is where 95% of pull-runs finish; the remaining 5% take even longer.
Concretely: if 100 collectors each opened Twilight Masquerade packs until they pulled Eevee, roughly 50 of them would have it by pack 262, 95 of them would have it by pack 1,130, and a handful would still be chasing past that. Expected ≠ guaranteed; the geometric distribution is famously long-tailed on the right side.
Confidence bands — packs vs cumulative probability
| P(pulled by N packs) | Packs needed | Sealed cost at $5/pack |
|---|---|---|
| 10% | 40 packs | ~$200 sealed cost |
| 25% | 109 packs | ~$545 sealed cost |
| 50% | 262 packs | ~$1,310 sealed cost |
| 75% | 523 packs | ~$2,615 sealed cost |
| 90% | 869 packs | ~$4,345 sealed cost |
| 95% | 1,130 packs | ~$5,650 sealed cost |
| 99% | 1,738 packs | ~$8,690 sealed cost |
Read this table as "what fraction of openers have pulled Eevee by pack N?". A 25% band of 109 packs means a quarter of openers hit it inside that window; 99% means almost everyone has hit it by pack 1,738. The dollar column anchors the variance to real-world sealed-pack cost at $5/pack.
Cheaper to buy Eevee as a single?
Buying Eevee as a single on TCGplayer (~$91.49) is dramatically cheaper than chasing it through packs — the expected pack-rip cost is roughly $1888, well above the market price.
Pack-rip expected dollar cost for this specific card: ~$1,888 at $5 per Twilight Masquerade pack. Compare to $91.49 for the single on TCGplayer (Unlimited / non-graded copy at current market). The single buy obviously delivers exactly this card; the pack-rip approach delivers Eevee plus the remaining 9 cards in every pack along the way — which is why the EV calculator at /ev/sv6 spreads the cost across the whole pack contents instead of pinning it to one card.
About Eevee (Twilight Masquerade)
Eevee is a Illustration Rare card from Twilight Masquerade, the 2024 Pokémon TCG expansion. Twilight Masquerade (2024) puts 20 cards on the Tera subtype and keeps ACE SPEC going with six. Across 226 cards the art layer is balanced — 21 Illustration Rares, 11 Special Illustration Rares and six Hyper Rares. Grass and Water lead at 34 and 30, while Darkness is unusually thin at six. One hundred and twenty-one illustrators contributed.
This specific card ranks as one of the top-3 most valuable pulls in Twilight Masquerade by TCGplayer market value, which is part of why the chase math is what it is — high market value tends to track with rarity-tier depth, since lower pool sizes concentrate value into fewer cards. The complete top-25 Twilight Masquerade ranking shows where Eevee sits relative to the rest of the chase pool.
Pull odds in context
For reference, a "1 in 378" pull is roughly comparable to a deep chase — multi-box territory, often case-level commitment. The variance is the killer: any one pack could be the one. The simulation on PackRip's Twilight Masquerade opener uses the same exact RNG model, so you can stress-test the wait curve without spending real money.
Related chases
- Greninja ex — Special Illustration Rare, $385.46 market
- Perrin — Special Illustration Rare, $183.65 market
- All Eevee printings across 51 sets
- All top-25 Twilight Masquerade chases
- Complete the Twilight Masquerade binder — full calculator
Open Twilight Masquerade free
Rip Twilight Masquerade packs free on PackRip's simulator with the same per-rarity pull rates this page is built from. The Hunt Pack mode boosts the Illustration Rare slot if you specifically want to optimise for Eevee-tier pulls. Coin economy is virtual — no real money on the line.
Strategy: optimising the Eevee chase
Every experienced Twilight Masquerade hunter eventually picks one of three approaches for a specific chase card. The cheapest is the snipe: skip pack-ripping entirely, set a TCGplayer alert at or below the current $91.49 market, and wait for a motivated seller. This is the route most efficient-frontier collectors take when the chase is locked behind a deep rarity tier — and the math above shows why. The expected pack-rip cost ($1,888) is typically multiples of the single price, and the variance on that expectation is wide enough that a single bad streak can blow past the 95% confidence bound. The single buy is dollar-for-dollar cheaper and emotionally cheaper too — no more refreshing pack-pull videos at 3am.
The middle path is the box-rip-then-snipe: open a sealed booster box of Twilight Masquerade (typically 36 packs for vintage sets), enjoy the experience, then if you didn't hit Eevee in the box, buy the single for $91.49. A 36-pack box delivers a probability of 1 − (1 − p)36 ≈ 9.1% of pulling Eevee at least once, where p is the per-pack hit rate of 0.002648. So a sealed box gives you roughly a 9% chance of hitting this card "for free" alongside the rest of the box contents, plus the rip experience. If you miss, you backstop by buying the single — total worst-case cost is the box price plus the single. Most rational hobbyists end here.
The expensive path is pure-rip-to-pull: keep opening packs until Eevee appears. The expected total cost is ~$1,888, but the 95th percentile pushes that to ~$5,650. Almost nobody who does this comes out ahead financially — but it produces the binder story, the YouTube content, and the cumulative pulls of the entire pack contents along the way. If your real goal is collecting all of Twilight Masquerade, not just acquiring Eevee, the pure-rip path has an internal logic the singles path doesn't.
Variance is the entire story
Here's a concrete illustration of how wild the geometric distribution gets at low p. Consider 10 hypothetical openers all chasing Eevee from Twilight Masquerade. Mathematically, you'd expect their results to cluster near the 378-pack expectation — but they won't. Roughly 5 will pull Eevee within the first 262 packs and feel lucky. Roughly 3 will pull between 262 and 378 packs and feel "about average". And roughly 2 will be still pulling past pack 378, with one of them potentially stretching past the 95% bound of 1,130. The unlucky ones will swear the simulator is rigged, the rates are wrong, or that they have terrible RNG — but the math says exactly this distribution should happen every time. The geometric distribution has no memory: each pack is an independent draw, and a 100-pack dry streak does not increase the odds of the next pack hitting.
How Eevee compares to the broader Twilight Masquerade chase pool
Eevee sits in the Illustration Rare tier of Twilight Masquerade's rare-slot pool. 21 cards share this tier, and the tier itself fires roughly 5.56% of the time per pack. That means the per-pack chance of pulling any Illustration Rare card (not just Eevee) is 5.56%, which makes the expected wait for any Illustration Rare card much shorter than the wait for this specific one. Pull-rate intuition: a single chase from a 6-card tier is 6× rarer than the tier itself. The deeper the pool, the longer the chase. This is also why "wide" sets with many chase cards in a single tier feel grindier per individual card despite the tier hit rate being identical — a thicker tier dilutes each card's specific share.
If your real goal is "any chase card from Twilight Masquerade" rather than "Eevee specifically", the math gets dramatically friendlier — the wait drops to ~18 packs on average for the tier as a whole. Most binder collectors approach it this way: chase the tier broadly across multiple sets, accept whatever pulls, and snipe the specific holes via TCGplayer later. Targeting one card from a thick tier is the most expensive way to play the chase, and Eevee is no exception.