Devsisters' CookieRun: Crumble offers free Sweet n' Sour pet via MID sharing

Devsisters' mobile RPG CookieRun: Crumble lets players obtain a free Sweet n' Sour pet by sharing their 9‑digit Mercenary ID (MID) with friends. When a referred player clears Stage 1‑30, the referrer earns points that unlock copies of the pet, with up to 84 copies available.

The game also features a broader pet system that becomes accessible after reaching Quest 39 and clearing Stage 1‑14. Each pet provides a Standard Pet Effect and a Companion Effect, and players can equip up to three pets to apply companion bonuses to their Cookie squad.

Guides detail how to locate the MID in the Settings → Account menu, how to copy it, and where referral rewards appear on the screen. The pet roster includes characters such as Hot Doggie, Pocket Strawberry, and other whimsical companions that enhance gameplay through their effects.