Cosmic Eclipse Secret Rare Pull Rate — 5.00% per pack (1 in 20)
5.00% of Cosmic Eclipse booster packs contain a Secret Rare card — roughly 1 in 20 packs. Cosmic Eclipse ships 20 Secret Rare cards in the pool, so the chance of pulling any specific Secret Rare is 0.0025 (≈1 in 400). These percentages come from PackRip's own rate table (the same constants the simulator runs on) — they are a model of the product, not a measurement of it. The Pokemon Company has never published pull rates.
Cosmic Eclipse Secret Rare pull-rate methodology
| Formula | Tier odds = 5.00% per pack; per-card odds = tier odds ÷ 20 Secret Rare cards = 1 in 400. |
|---|---|
| Assumptions | One independent rare-slot roll per pack; uniform selection within the tier; no pity timers, box mapping, short-print correction, or edition/condition split. |
| Data source | Set checklist and rarity labels from the bundled Pokemon TCG API catalog; tier rates from rareSlotRates(), mirrored from the live pack opener. |
| Update cadence | Regenerated by prerender whenever set metadata, catalog data, or pull-rate constants change. |
| Limitations | This is a theoretical per-pack rate. Real sealed product can show print-run variance, collation quirks, and market-specific edition differences. |
Secret Rare cards in Cosmic Eclipse
| # | Card | TCGplayer market | Per-card odds |
|---|---|---|---|
| 1 | Pikachu #241 | $230.63 | 1 in 400 |
| 2 | Piplup #239 | $79.96 | 1 in 400 |
| 3 | Mimikyu #245 | $65.89 | 1 in 400 |
| 4 | Koffing #243 | $39.64 | 1 in 400 |
| 5 | Lillie's Poké Doll #267 | $31.76 | 1 in 400 |
| 6 | Magnemite #242 | $22.64 | 1 in 400 |
| 7 | Steelix #247 | $18.64 | 1 in 400 |
| 8 | Wishiwashi #240 | $15.35 | 1 in 400 |
| 9 | Gallade #244 | $14.51 | 1 in 400 |
| 10 | Torkoal #237 | $12.66 | 1 in 400 |
| 11 | Weavile #238 | $12.56 | 1 in 400 |
| 12 | Stoutland #248 | $11.95 | 1 in 400 |
| 13 | Martial Arts Dojo #268 | $11.60 | 1 in 400 |
| 14 | Power Plant #269 | $10.82 | 1 in 400 |
| 15 | Tag Call #270 | $10.47 | 1 in 400 |
| 16 | Giant Hearth #263 | $9.84 | 1 in 400 |
| 17 | Lana's Fishing Rod #266 | $9.81 | 1 in 400 |
| 18 | Excadrill #246 | $5.37 | 1 in 400 |
| 19 | Island Challenge Amulet #265 | $4.93 | 1 in 400 |
| 20 | Great Catcher #264 | $4.70 | 1 in 400 |
How the 5.00% rate is computed
Every Cosmic Eclipse booster pack rolls one rare-slot card (plus uncommons, commons, and energy in fixed slots). The rare slot is itself a weighted random draw across 6 tiers — Rare, Holo Rare, Secret Rare, and the era's other chase rarities. The Secret Rare tier captures 5.00% of those rare-slot draws (= 5.00 packs out of every 100). Within the Secret Rare tier, all 20 cards share the slot uniformly, so per-card odds are 5.00% ÷ 20 = 0.0025 = 1 in 400.
This is the same math PackRip's live Cosmic Eclipse simulator uses to roll packs — open as many as you want for free, watch the empirical hit rate converge to the theoretical 5.00% over a large enough sample. Source code lives in src/utils/packGenerator.ts and the per-rarity drift is build-time-asserted against the published rates so the simulator and this landing page can never disagree.
Cumulative probability — how many packs to hit Secret Rare
Secret Rare pulls follow a geometric distribution with per-pack rate 0.050000. The expected number of packs until your first Secret Rare hit is 20; at 95% confidence you'll have one within 59 packs. Most experienced openers crack a sealed booster box (36 packs) and hit Secret Rare with probability 84.2% — so the average box yields just over 1.8 Secret Rare pulls.
Related on PackRip
- Open Cosmic Eclipse packs free — same pull rates, live RNG
- Cosmic Eclipse binder completion calculator
- Cosmic Eclipse per-pack expected value
- Top 25 most valuable Cosmic Eclipse cards