🐭 Grey Mouse Pet in Grow a Garden — Legendary
Grey Mouse is a Legendary pet from the Mythical Egg (36%), added in the Blood Moon update. It levels itself and gives you a speed boost.
Last verified against the Grey Mouse page and the ability data on the Grow a Garden wiki.
Mythical Egg, 36%.
📋 Grey Mouse at a glance
| Rarity | Legendary |
|---|---|
| How to get | Mythical Egg (36%) |
| Hunger | Not listed on the wiki |
| Ability (wiki wording) | Whisker Wisdom - Gains 500 bonus experience every 10 minutes. Increases the player's movement speed by 12% (Slightly increases as the player's pet(s) get(s) older). |
| Added | May 17, 2025 |
| Still obtainable? | Yes, per the wiki |
⚡ What its two abilities do
Whisker Wisdom: every 10 minutes 3 seconds at base weight, the Grey Mouse gains 500 bonus XP for itself.
Scamper: you move 12% faster while it's out.
The Brown Mouse from the same egg is the stronger self-leveler (750 XP every 8:23, and a jump bonus instead of speed). The wiki lists both mice among the few pets that give themselves XP, with the Squirrel, Starfish, Mochi Mouse and Tanuki.
📈 Grey Mouse stats by weight
| Pet weight | Cooldown | Bonus XP |
|---|---|---|
| 10 kg | 8:43 | 580 |
| 25 kg | 6:43 | 700 |
| 50 kg | 3:23 | 900 |
| 74 kg | 0:15 | 1,092 |
| Pet weight | Speed bonus |
|---|---|
| 10 kg | 13% |
| 25 kg | 14.5% |
| 50 kg | 17% |
| 74 kg | 19.4% |
The cooldown falls 8 seconds per kilogram to a 15-second floor at about 74 kg, and each payout grows 8 XP per kilogram with no cap: about 1,090 XP every 15 seconds at 74 kg. The speed bonus grows 0.1% per kilogram.
⚡ See Grey Mouse's ability at your pet's weight →
❓ FAQ
What does the Grey Mouse do in Grow a Garden?
It gives itself 500+ bonus XP every 10:03 at base weight (0:15 at about 74 kg), and you move 12%+ faster.
Grey Mouse or Brown Mouse?
Brown Mouse for leveling. Pick the Grey Mouse if you want the speed bonus.