PSX Classic Pet Collection: How to Fill the Index

The PSX Classic pet collection is a progression system where you hatch eggs, fuse duplicates, and unlock pet variants to fill the 393 total entries. Registering pets grants extra equip slots at key milestones like 350 pets.

How Do You Fill the Pet Index in PSX Classic?

The pet index is a catalog tracking 393 individual pet entries across normal, golden, and rainbow tiers. Players register entries primarily through routine egg hatching across each unlocked zone. When you unlock and hatch pets such as the Bunny, Chicken, Bear, or Monkey, the basic version immediately logs into your collection.

Auto-deleting lower-rarity pets during long hatching sessions does not prevent collection credit. Even when basic or rare pets are automatically deleted from your inventory to save space, the game still registers the discovery in your index. As you reach total count milestones across the 393 entries, you gain benefits that let you equip more pets at the same time, expanding team capacity at thresholds such as 350 total pets.

To fill out the remaining entries, duplicate pets must be transformed into alternative forms:

1. Hatch multiple base copies of common, rare, or epic pets from regional eggs.
2. Visit the crafting machines in the mine to fuse duplicate pets into rainbow variants.
3. Pay the required gem fee to attempt the transformation, which displays explicit success odds such as 63% or 88%.
4. Open dedicated golden eggs or combine standard pets to fill golden catalog slots.

Which Egg Types and Tiers Fill Collection Slots?

Standard eggs are the primary source for base index discoveries across each zone. Each pet family requires separate normal, golden, and rainbow entries to achieve a complete pet index, meaning a single creature line often represents three distinct collection slots. Certain rare spawns, such as the Noob pet, feature hatch chances as low as 0.2%, requiring repeated egg openings or targeted fusion combinations.

Where Is the Secret Dominus Egg Located?

The Dominus egg is a hidden purchase station tucked behind the shop area in the spawn world. Accessing this station requires completing a specific sequence in the main map:

1. Travel to the cave zone and equip your strongest pets.
2. Break the large coin chest sitting inside the cave.
3. Teleport back to the shop area immediately after destroying the chest.
4. Walk to the upper platform and sacrifice 100,000 standard coins to remove the barrier.
5. Approach the Dominus egg, which costs 1,000,000,000 coins per hatch.

The Dominus egg pool contains high-tier pets and legendaries that provide credit toward late-stage collection totals.

How Do You Manage Currencies Across Different Worlds?

World currencies are zone-specific resources required to purchase advanced eggs and register foreign creatures. After completing basic collections in the spawn area, progression moves into the fantasy world, which requires specialized fantasy coins for every egg opening. Pets hatched in this second realm include the Fairy, Dalmatian, Dove, Cupcake, and Shadow Griffin.

To sustain continuous egg openings in the fantasy realm, assign your active pet roster to the giant fantasy chest. Pets equipped with fantasy coin perks accelerate your earnings while you hatch missing entries. As detailed on the official Roblox game page developed by Oracle Production, the experience supports 50 players per server, allowing multiple collectors to break large coin targets simultaneously to fund their collection progress.

Where does this guide's official PSX Classic information come from?

Official details in this guide follow Halloween Games! Pet Simulator 99 Update 100 - BIG Games, which describes the game in its own words.

Huge Witch Cat - The Cursed Egg in PSX Classic.

Halloween Games! Pet Simulator 99 Update 100 - BIG Games