Premium Booster -The Best- pull rates

10 cards per booster, 20 packs per box and 10 boxes per case. Reviewed 2026-11-05 (UTC).

Every individual-card number is an educated estimate, not a measured or official probability. Equal selection within each reviewed printing tier is assumed. Small community reports are context, not proof of a fixed box/case quota.

Premium Booster model uses 20 packs per box and 10 boxes per case, with 10 cards per pack. Educated slot averages: 5 ordinary bulk cards, 1 Rare, 0.9 SR, 0.1 SEC, 1.8 patterned foils, 0.1 alternate art and 0.1 full-art/textured card per pack. Exact finish allocation is uncertain.

Chase priors: any Manga/Super Alternate Art averages one in four cases; gold SP or signed card one in twenty; super Leader one in ten. These are especially uncertain analogues, split across the listed tier. Zero observed hits is never treated as impossibility.

Promotional inserts, bonus packs and box toppers are excluded from ordinary booster odds. A card number appearing in multiple sets does not make the printings interchangeable.

PRB01 nine reprint Manga cards share the same assumed God-pack frequency (one in 15 cases), not nine independent chase slots. Nami uses a separate one-in-three-cases prior. Rare-pack clustering is not modelled in the independent-pack calculator.

Premium base denominators retain the official card-type totals where the imported catalogue omits separately priced base printings. Special pulls replace part of the patterned-foil allocation. PRB01 Alternate Art source labels are treated as a broad alternate-printing pool, not proof of a measured finish distribution.

Sources: Bandai English product catalogue (card types, not odds); English OP01 community opening report (secondhand, six cases); English PRB01 opening discussion (two-box first-hand reply; later case structure unverified); Bandai Premium Booster product specification. These sources describe product contents or community experience; none measures every exact card’s probability. The full evidence ledger is retained for review.

The model uses assumed tier frequencies and fixed reviewed card pools. It does not infer rarity from price, and an absent price does not remove a card from its pool. A conditional estimate does not confirm that the exact printing appears in boosters.