Dr. Gero, Progenitor of Terror BT9-115 SPR pull rates
Universal Onslaught · 2020 · Special Rare
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Estimated raw price
$3.15 USD
Special Rare
Price updated 1 Nov 2026 (UTC)
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Universal Onslaught: Estimated case chance: 100%.
! Rough estimate · Limited evidence
12 SPRs per case across 10 different cards.. Individual card frequencies are estimated. Actual rates may vary. Specific SCR figures follow the supplied 50% case-coverage estimate. Duplicate SCR allocation is not separately modelled.
Chance of pulling at least one
Booster pack
0.42%About 1 in 240 packs
Booster box
10.00%24 packs
Booster case
100%12 boxes · 288 packs
How many packs are you opening?
Chance: 10.00%
Counts full sealed cases first, then remaining boxes and packs.
Dr. Gero, Progenitor of Terror BT9-115 SPR pull-rate questions
What are the odds of pulling Dr. Gero, Progenitor of Terror BT9-115 SPR from Universal Onslaught?
0.42% per pack, 10.00% per box and 100% per case.
How many packs does it take to pull Dr. Gero, Progenitor of Terror BT9-115 SPR?
Estimated case chance: 100%. Each case has 288 packs across 12 boxes.
Is Dr. Gero, Progenitor of Terror BT9-115 SPR guaranteed in a booster box or case?
There is no fixed guarantee for this card in this model. One box has an estimated 10.00% chance.
Are these official pull rates?
The seeding information comes from community sources; Bandai provides the product sizes and rarity counts.
About these estimates
Specific SCR figures follow the supplied 50% case-coverage estimate. Duplicate SCR allocation is not separately modelled. 12 SPRs per case across 10 different cards. The rarity totals follow the working model above; named-card frequencies and repeated identities are estimated. It counts full cases first, then opens remaining boxes and packs. Separate cases are treated independently.
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