I’m not seeing a reliable source for “summer pearls” in Rivals from the available public results, so I can’t confidently tell you the exact unlock method. The closest match I found is the Marvel Rivals Summer Special Event , where summer-themed rewards are unlocked by simply playing matches and earning EXP toward level unlocks.

What the event seems to do

  • Rewards are earned through normal gameplay, not by buying or crafting them.
  • Progress comes from match EXP, so consistent play is the main way to advance.
  • A recent update video also describes the summer event as bringing new skins, free units, and a new map.

Practical way to check

  • Open the event page in-game and look for a reward track or challenge list.
  • Play matches in the event period and watch whether “pearls” are tied to EXP milestones or a separate currency.
  • Check whether the pearls are a free-track reward, mission reward, or shop item.

Based on the current info

If you mean Marvel Rivals , the safest answer is that summer event rewards appear to be obtained by playing matches and leveling the event track rather than a special hidden method. If “summer pearls” refers to a different game or a specific in-game item name, the exact name may need a different source to verify.