Pet Simulator 99 Auto Upgrade Script

Working No Key 4.7

pet-simulator-99-auto-upgrade.lua

-- Pet Simulator 99 Auto Upgrade | blox.sh
-- Updated: July 2026
loadstring(game:HttpGet(
  "https://blox.sh/raw/pet-simulator-99/auto-upgrade-script.lua"
))()

You need a script executor to run this. Get a free one →

How to use this script

1 Get a script executor. Roblox scripts only run inside an executor. If you don't have one, grab a free working executor here.

2 Copy the script using the Copy button above (or Download the .lua file).

3 Open Pet Simulator 99, attach your executor, paste the script, and press Execute. The menu opens in-game.

What this script does

Automatic upgrades

Automatically upgrade your pets' stats without manual clicks in Pet Simulator 99.

Prioritize best pets

The script focuses upgrades on your highest-level or rarest pets for efficient progression.

Continuous running

Runs upgrades continuously while you play or are idle, maximizing pet power gains.

Resource management

Smartly uses your in-game coins and gems to upgrade pets without wasting resources.

Easy setup

Simple to start and configure, no complex commands needed to automate upgrades.

New to this? Learn what Auto Upgrade is and how it works

How it works

The Pet Simulator 99 auto upgrade script hooks into the game's upgrade system to automatically spend your coins and gems upgrading your pets' stats. It detects which pets can be upgraded and prioritizes those that will give you the best boost, so you don't have to click repeatedly or decide manually.

Once activated, the script runs in the background, continuously checking if you have enough currency to upgrade pets and applying upgrades instantly. This saves you time and helps your pets grow stronger faster, letting you collect and progress more efficiently.

Frequently asked questions

Can the auto upgrade script upgrade all pets at once?

The script prioritizes pets based on level and rarity but upgrades pets sequentially, focusing on the best ones first rather than all at the exact same time.

Will the script use all my coins and gems automatically?

It uses your resources efficiently by upgrading pets when you have enough currency, but it avoids wasting resources on low-impact upgrades to maximize progress.

Does the auto upgrade script work during events or special game modes?

Yes, the script functions during normal gameplay and most events, but some special modes with restricted upgrades may limit its effectiveness temporarily.

Is the Pet Simulator 99 auto upgrade script free to use?

Yes — every script on blox.sh is completely free, with no key system or paywall.