When a golden egg spin rolls a monster that the player already has, it reduces move cooldown by 3%. The number of duplicates rolled is indicated in the stat screen under "bonus +x" where x is the number of duplicates. A monster can have a maximum bonus of +9.
Below are the time reduction values per bonus point in relation to the original monster:
| Bonus | Calculated
Time Reduction |
Reported
Time Reduction* |
|---|---|---|
| +1 | 3% | 3.2% |
| +2 | 5.9% | 6% |
| +3 | 8.8% | 8.8% |
| +4 | 11.5% | 12% |
| +5 | 14.1% | 13.6% |
| +6 | 16.7% | |
| +7 | 19.2% | 14.8% |
| +8 | 21.63% | |
| +9 | 24.0% | 15.0% |
*Reported times are from this post