Dual Impact Booster Display [GD02] EV Calculator

Best Evidence — English opening context + disclosed assumptions

Evidence

This calculator is based on Best Evidence — English opening context + disclosed assumptions reviewed September 3, 2026.

Sources

• Dual Impact [GD02] official English-US product page - Bandai Co., Ltd. (accessed 2026-09-03)
• TCGCSV category 86 group 24408, sealed product 650748 - TCGCSV (accessed 2026-09-03) — identity and pricing were imported into local generated artifacts; the calculator does not call the raw endpoint.
• GD02 official English filtered card roster; identity evidence only - Bandai Co., Ltd. (accessed 2026-09-04)
• GD02 photographed English 24-pack box opening, 2026-02-07; European distribution - Gundanium Gateway (Sergeant Shokugan) (accessed 2026-09-04)
• Exact Normal EXB-001 and EXR-001 English marketplace identities in GD01 group - TCGCSV (accessed 2026-09-04) — identity and pricing were imported into local generated artifacts; the calculator does not call the raw endpoint.
• Community reports of repeated GD02 booster-box card maps - r/GundamTCG contributors (accessed 2026-09-03)
• Community discussion of seeded GD02 booster boxes - r/GundamTCG contributors (accessed 2026-09-03)
• Best Evidence — English opening context + disclosed assumptions and ordinary-pool classification - The Expected Value (accessed 2026-09-03)

Limitations

• Bandai publishes 13 physical cards per English-US pack and 130+13 card types, but it does not publish the complete ordinary slot probabilities, replacement mapping, or per-card weights.
• TCGCSV category 86 group 24408 contained 187 card products, 187 with a non-null TCGplayer Low field, when reviewed. The 191 price rows split into 101 Normal and 90 Holofoil rows. This establishes current row availability only; without a reviewed model it does not establish expected-mass coverage.
• Normal and Holofoil are marketplace subtype labels, not automatically frame/style Treatments. Every duplicate-number and finish row must be mapped to an exact SKU before it can enter a model.
• The no-chase baseline has no separate English collector product to use instead. Before approval, every +, ++, SP, Link Rare, premium Resource, and other chase SKU and branch must be enumerated and omitted entirely.
• The product-specific photographed English opening and community reports support eight ordinary Legend Rares and two parallel game cards among 48 high-rarity positions. The no-chase model normalizes the retained 38 Rare to 8 Legend Rare marginal; it does not reproduce repeated box maps or seeded correlations.
• The reviewed community posts do not publish a machine-readable box ledger with exact product IDs, subtype treatments, independent case count, observation interval, and every ordinary-card frequency.
• The 13-type Normal support pool contains R-010 through R-019, T-012 and reused basic EXB-001/EXR-001. The two EX marketplace identities are in group 24221 and must be imported explicitly; their omission from GD02's marketplace group is not absence from the booster. Equal per-card weights are an assumption.
• Modeling policy approved 2026-09-03: every supported ordinary card in the same slot, rarity, treatment, and finish pool receives one equal positive selection weight. This is a transparent modeling assumption where the publisher or empirical sample gives pool odds but not card-level sheet weights.
• The English thirteen-card wrapper and exact ordinary printings are source-backed. One photographed English 24-pack European-distribution opening informs the retained 38 Rare:8 Legend Rare marginal. Six Common, four Uncommon, two interchangeable high positions and uniform inner weights remain explicit allocation assumptions; no Japanese or complete English factory ledger is claimed.
• Card identities, physical finishes and product units are English-US. The single English opening provides partial empirical context; it does not establish factory or case guarantees.
• The approximation is first-order and GD02-specific. No display or case correlation is inferred, and no other set supplies GD02 rates.
• Within each retained English rarity/treatment pool, exact ordinary printings use equal positive weight where publisher sheet weights are unavailable. Missing quotes do not remove identities or reweight the draw.
• Per pack approximation: 6 Common, 4 Uncommon, two Rare-or-Legend-Rare draws weighted 19/23 Rare and 4/23 Legend Rare after chase removal, plus one Resource/EX Resource/EX Base/Unit Token. The 24-pack English display contains exactly 312 modeled physical cards; its expected ordinary Legend Rare count is 192/23 (about 8.35), not 16.
• Revisit these assumptions when a complete, attributable English collation ledger or publisher rate table becomes available for the exact release.
• GD02's photographed English 24-pack opening reports eight ordinary Legend Rares and two parallel game cards. The model retains six Common, four Uncommon, two Rare-or-better and one support position per pack as explicit allocation assumptions. The European-distributed sample does not establish an English-US factory or case ledger.
• The GD02 high-rarity model conditions 38 ordinary Rare and 8 ordinary Legend Rare outcomes on removing both unsupported parallel positions, normalizing to 19/23 Rare and 4/23 Legend Rare before drawing. Equal positive weights within each exact English pool and independent draws are explicit marginal assumptions; observed duplicate patterns, box guarantees and seeded case correlations are not preserved.
• The +1 uses 13 exact Normal English supports: R-010 through R-019, T-012, basic EXB-001 and basic EXR-001. The EX cards reuse marketplace products 643300 and 643301 from group 24221. Each support receives assumed 1/13 weight after foil Resource chase removal; no support enters the six-Common game-card positions. Bandai's rarity/type counts establish roster identity, not selection rates.
• All C+, U+, R+, LR+, C++ and LR++ parallel identities are excluded before drawing and retained slot outcomes normalized. Draw all 312 cards before Sift or user filtering, with no filtered-card backfill. There is no additional topper, DON!!, promo or starter bonus. Embedded pack expectation has the same marginal as display expectation divided by 24, including one support-card expectation; its Low/Mid/High range is independently simulated from a complete thirteen-card pack.
• No-chase redraw policy approved 2026-09-03: Curio, Enchanted, alternate-art, parallel, showcase, serialized, signature, premium-rarity, promotional, and any other card or treatment without a supported pull rate are excluded. A chase hit is redrawn from the applicable supported ordinary pool, so excluded cards occupy no modeled outcome.
• Simulation ordering is draw the complete disclosed no-chase product first, record that draw, and only then apply Sift or another user filter. Sift never changes or backfills the completed modeled draw.