Bubble Gum Simulator vs Pet Simulator 99: The Definitive Roblox Pet Game Comparison (2026)

Updated May 16, 2026 · 12 min read · Comparison Guide

Two pet simulators. One throne. Bubble Gum Simulator stormed onto Roblox in 2018 and dominated the pet-collecting genre for years, racking up over 1.2 billion visits. Then Pet Simulator 99 arrived in late 2023, built by BIG Games, and reshaped what players expect from a pet sim on the platform.

If you only have time for one pet game, which one deserves your hours? We put both games through a full head-to-head breakdown covering gameplay loops, player activity, trading depth, update frequency, and long-term staying power. By the end of this guide, you will know exactly which game fits your playstyle.

Whether you are a returning BGS veteran curious about Pet Sim 99 or a newer player trying to figure out where to invest your time, this comparison lays out the facts without fluff.

Quick Comparison Table

Feature	Bubble Gum Simulator	Pet Simulator 99
Developer	Rumble Studios	BIG Games
Launch Year	2018	2023
Total Visits	1.2B+	8B+
Concurrent Players	~5K	~117K
Core Loop	Blow bubbles, hatch eggs, collect pets	Hatch eggs, merge pets, enchant, battle
Trading	Yes (less active)	Yes (highly active)
Worlds/Areas	20+ unlockable worlds	100+ areas with progression
Pet Count	300+ pets	1000+ pets
Update Frequency	Monthly (slower now)	Weekly/bi-weekly
Codes Available	200+ (many expired)	Regular new codes
Clan/Group System	Limited	Full clan battles
Place ID	2512643572	8737602449

Gameplay Breakdown: How Each Game Plays

Bubble Gum Simulator - The Original Formula

BGS built its reputation on a simple but addictive loop. You blow bubbles to gain currency, spend that currency on eggs, hatch pets from those eggs, and equip pets that boost your bubble-blowing power. Rinse and repeat as you unlock new worlds with increasingly rare pets.

The genius of BGS was its simplicity. Anyone could jump in, understand the mechanics within minutes, and start working toward their first rare pet. Worlds unlock sequentially as you hit bubble-size milestones, giving you a clear progression path from the Starter Area all the way through to the endgame zones.

Selling pets, combining duplicates for upgrades, and trading with other players round out the experience. Seasonal events drop limited-time pets that become valuable trade pieces months later. The game also features a rebirth system that resets your progress for permanent multipliers, adding a prestige layer for dedicated grinders.

Pet Simulator 99 - The Modern Standard

Pet Simulator 99 took everything the genre established and cranked it to the next level. The core egg-hatching loop remains, but BIG Games layered on systems that keep endgame players engaged far longer than most competitors manage.

Merging is the standout mechanic. Combine identical pets to create stronger versions, pushing your damage numbers into the trillions and beyond. Enchanting adds randomized buffs to your pets, creating a chase for perfect rolls. Clan battles pit groups of players against bosses for exclusive rewards, adding a cooperative element that solo-focused games miss entirely.

The area count exceeds 100, each with distinct aesthetics and scaling difficulty. Hardcore mode offers a separate progression path for players who want even more challenge. The sheer volume of content means you can play for months and still have goals to chase.

BIG Games also nailed the event cadence. Weekly events keep the community engaged, and seasonal updates overhaul entire sections of the game with new mechanics, areas, and limited pets that drive trading activity through the roof.

Player Count and Community Activity

Numbers tell a clear story here. Pet Simulator 99 consistently maintains around 117,000 concurrent players during peak hours. That places it firmly in the top 10 most-played Roblox experiences at any given time. The community is massive, with active Discord servers, YouTube creators producing daily content, and value lists updated in real-time.

Bubble Gum Simulator, by contrast, sits around 5,000 concurrent players in 2026. That is still respectable for a game approaching eight years old, but the gap between the two titles is enormous. BGS peaked in 2019-2020 when it regularly held 50K+ concurrent players, and it has declined steadily as newer pet sims captured attention.

What does this mean for your experience? In Pet Sim 99, you will always find trade partners, active servers, and community engagement. In BGS, servers are quieter, trades take longer to complete, and the community is smaller (though often tighter-knit and more nostalgic).

For context, BGS has accumulated over 1.2 billion total visits across its lifetime, which speaks to its cultural impact on Roblox. It introduced millions of players to the pet-sim genre. Pet Sim 99 is on track to surpass that total visit count, having already crossed 8 billion thanks to its sustained concurrent numbers.

Trading Economy Compared

Both games feature player-to-player trading as a core endgame activity, but the depth and liquidity of each market differ substantially.

BGS Trading

Bubble Gum Simulator established one of Roblox's first major pet trading economies. Limited pets from past events (Secret pets, Valentines exclusives, Halloween specials) command significant value. The market is slower-moving in 2026, with fewer active traders and longer wait times to find buyers for mid-tier items.

Value lists exist but update less frequently. Scamming risks are present in any trading game, and BGS's older trade interface lacks some of the safety features newer games have implemented. That said, if you hold rare legacy pets, they retain value precisely because supply is permanently capped.

Pet Sim 99 Trading

Pet Simulator 99's trading economy is one of the most active on all of Roblox. With 117K concurrent players, finding trade partners takes seconds. The game features a built-in trading plaza, community value lists that update daily, and a hierarchy of pet rarities that creates genuine market dynamics.

Huge pets, titanic variants, and event exclusives form the high-end market. Enchanted pets with perfect rolls add another value dimension. The economy moves fast, with prices shifting during events and updates. Savvy traders can genuinely accumulate wealth by understanding market cycles around update announcements.

BIG Games has also implemented trade verification features and scam-prevention measures that make the experience safer than older titles. The booth trading system lets you set up shop even while AFK.

Mechanics Depth: What Keeps You Playing

Longevity in a pet sim depends on how many systems exist to master beyond the basic hatch-and-collect loop.

Bubble Gum Simulator offers:

• Bubble blowing with size milestones
• Egg hatching across 20+ worlds
• Pet equipping (limited slots)
• Rebirth/prestige system
• Seasonal events with limited pets
• Basic trading system
• World unlocking progression

Pet Simulator 99 offers:

• Egg hatching across 100+ areas
• Pet merging (combine for upgrades)
• Enchanting system (randomized buffs)
• Clan battles (cooperative boss fights)
• Hardcore mode (separate progression)
• Booth trading + direct trading
• Mastery system
• Achievement hunting
• Weekly events and challenges
• Seasonal overhauls

The difference is clear. Pet Sim 99 gives you substantially more to do at every stage of the game. Whether that depth appeals to you or feels overwhelming depends entirely on what you want from a pet simulator.

Some players prefer the streamlined BGS approach where you can zone out, blow bubbles, and hatch eggs without tracking six different progression systems. Others thrive on the min-maxing opportunities that Pet Sim 99 provides.

Who Should Play What?

Choose Bubble Gum Simulator If You...

Want a relaxed, nostalgic experience. BGS does not demand constant attention or optimization. You can hop in, blow some bubbles, hatch a few eggs, and log off without feeling like you fell behind. The pace is leisurely, and that is part of its charm.

Enjoy collecting legacy items. With eight years of events behind it, BGS has a deep catalog of limited pets that carry historical value. Owning a rare 2019 Secret pet is a badge of honor in the community.

Prefer smaller communities. The reduced player count means servers feel calmer. You will recognize regular players, build relationships with traders, and experience less chaos than peak-population games.

Are looking for free codes and boosts. BGS has released over 200 codes throughout its lifetime. While many have expired, active codes still provide meaningful boosts for new players starting their collection. Check our complete BGS codes list for every working code.

Choose Pet Simulator 99 If You...

Want the most active pet sim on Roblox. With 117K concurrent players, Pet Sim 99 is where the pet-sim community lives right now. Content creators, competitive traders, and dedicated grinders all congregate here.

Enjoy deep progression systems. Merging, enchanting, clan battles, hardcore mode, and mastery systems mean you will never run out of goals. The game rewards optimization and knowledge.

Love active trading. The trading economy in Pet Sim 99 moves fast and offers genuine depth. If you enjoy the market-playing aspect of pet sims, this game delivers the best version of that experience on Roblox.

Want regular content updates. BIG Games pushes new content weekly. Events, new eggs, balance changes, and seasonal overhauls keep the game fresh month after month. You will always have something new to chase.

Update History and Developer Support

Developer commitment matters for long-term investment in any live-service game.

Rumble Studios (BGS) maintained aggressive update schedules from 2018 through 2021, adding worlds, pets, and events regularly. Since then, updates have slowed considerably. The game still receives maintenance and occasional events, but the golden era of weekly BGS content is behind us. Rumble Studios has shifted focus to other projects while keeping BGS operational.

BIG Games (Pet Sim 99) treats their flagship title as a constantly evolving platform. The studio has a large team dedicated to Pet Sim 99, producing content at a pace few Roblox developers match. Their track record across the Pet Simulator series (Pet Sim, Pet Sim X, Pet Sim 99) shows consistent long-term support for their active title.

If ongoing developer investment influences your decision, Pet Sim 99 holds the clear advantage. You are joining a game at or near its peak, with years of planned content ahead. BGS is a mature title in maintenance mode, great for what it is, but unlikely to see major new features.

Earning Robux While You Play

Whichever game you choose, spending Robux on gamepasses and premium eggs accelerates your progress. But you do not need to spend real money. Earnaldo lets you earn free Robux by completing simple tasks, which you can then invest into your preferred pet sim.

For game-specific strategies on maximizing your Robux earnings, check out our dedicated guides:

• Bubble Gum Simulator Free Robux Guide - Best gamepasses and how to earn them free
• Pet Simulator 99 Free Robux Guide - Optimal Robux spending for Pet Sim 99
• Adopt Me Free Robux Guide - Another popular pet game worth exploring

Smart Robux investment can save you dozens of hours of grinding in either game. A single premium egg gamepass or auto-hatch boost pays for itself many times over in time saved.

Graphics, Performance, and Accessibility

Both games run on Roblox, so hardware requirements are identical. However, their visual approaches differ.

Bubble Gum Simulator uses a bright, cartoonish art style that has aged reasonably well. World designs are colorful and distinct. Performance is excellent even on lower-end devices since the game was built during an era when Roblox optimization was more constrained.

Pet Simulator 99 pushes Roblox's visual capabilities further with particle effects, dynamic lighting, and more detailed pet models. The tradeoff is slightly higher performance demands, though BIG Games has optimized well for mobile players. During peak events with many players in one area, lower-end devices may experience frame drops.

For accessibility, both games work across PC, mobile, Xbox, and all Roblox-supported platforms. Pet Sim 99 has better UI scaling for mobile players, reflecting more modern design standards.

Seasonal Events: Which Game Does Them Better?

Events drive engagement in pet simulators. Limited-time pets create urgency, and exclusive rewards give dedicated players bragging rights.

BGS ran excellent events during its prime. Halloween, Christmas, Valentine's, and Summer events each introduced themed worlds, exclusive pets, and time-limited challenges. Many of those event pets are now among the most valuable items in the game's trading economy. In 2026, events still occur but with less fanfare and reduced content compared to peak-era BGS.

Pet Sim 99 treats events as major productions. Each seasonal event overhauls portions of the game, introduces entirely new mechanics for the duration, and drops dozens of exclusive pets. The Easter, Halloween, and Christmas events in Pet Sim 99 rival standalone game updates in scope. Weekly mini-events fill gaps between major seasons, ensuring there is always fresh content to engage with.

If events are a big part of why you play pet sims, Pet Simulator 99 delivers more frequent and more substantial seasonal content by a wide margin.

Frequently Asked Questions