Pet Simulator 99 Plant & Combine Update 87 Guide: Combine-o-Matic, Diamond Egg & Super Rebirth (2026)

You log into Pet Simulator 99 on August 1 and the garden is suddenly the whole game. The “Pets vs. Coins” event everyone was grinding through the Piñata Maze just rolled into its second half, and Update 87 “Plant & Combine” dropped a machine that literally eats pets and spits out Huges. Half the lobby is standing at a new machine feeding it Sunflower Gifts. The other half is in the garden hatching eggs, and one guy in chat is already flexing a Titanic Blossom Kitsune.

This update isn’t a maze or a race. It’s an economy decision. There’s a merge chain that gives you Huges, a diamond egg that expires, a new rebirth layer gated behind three missions, and coin bosses that drop gifts. You can waste an entire event’s worth of gems and pets in here without a plan. This guide is that plan. If you’re still catching up on the event or the rebirth system, read the PS99 Piñata Maze Maximization Guide and the Rebirth Guide first; everything below assumes you know the basics.

What “Plant & Combine” Actually Adds

Here’s the shape of the update in one breath. It’s a garden theme layered on top of the Pets vs. Coins event. You plant and harvest crops, defeat coins that spawn around the map, and spend what you earn on four new systems: the Combine-o-Matic, the Fuse Machine, the Boost Machine, and an expanded Upgrade Machine.

The part that matters is the Combine-o-Matic, because it’s the first machine that converts your junk pets into top-tier pets on a guaranteed chain. Everything else — the coin bosses, the eggs, the Super Rebirth layer — feeds into it or competes with it for your time and gems.

That competition is the whole decision space. You only have so many pets, so many diamonds, and so many hours. This update punishes the player who does a bit of everything and commits to nothing.

Combine-o-Matic: Your Cheapest Route to a Huge

The Combine-o-Matic is the core mechanic. You feed it pets — or Sunflower Gifts, which are the event currency drop from coin bosses — and it merges them up a chain. A Gift becomes a better Gift, then a pet, then a stronger pet, and if you feed it long enough, the top of the chain is a Huge. Push past that and you’re in Titanic territory, which is how the Blossom Kitsune is earned.

Think of it as a crafting ladder where every rung is guaranteed. You don’t roll odds here. You put in N materials and you get the next rung out. That guarantee is what makes it different from eggs, and it’s the reason the Combine-o-Matic is the update’s sleeper value.

The Huge pets on the chain are Garlic Chick, Tomato Turtle, and Broccoli Dino. That’s three Huges reachable by pure grinding. No egg luck. No diamond spend. If you’ve ever chased a Huge by buying eggs and watched your gems vanish — the whole Huge and Titanic egg grind — this is the first time a Huge has a hard, visible price tag instead of a percentage.

Why It Beats the Eggs

Here’s the counterintuitive part most players miss on day one: the cheapest Huge in this update is not in an egg. It’s in a machine. Everyone queues at Garden Egg 12 trying to hatch a Huge Leek Lizard, or saves diamonds for the Diamond Egg, and both of those are lotteries. The Combine-o-Matic is a guaranteed rung-by-rung climb.

The tradeoff is that it’s slow and it eats material. You’ll be tempted to sell the pets you’d otherwise feed. We’ll get to that mistake, because it’s the one that ruins this update for most people.

The Mistake That Kills Your Merge Chain

Let me walk you through the exact way players throw this update away, because I’ve seen it in chat every day since launch.

You’re coin-farming the garden, and your inventory fills up with low-tier garden pets and Sunflower Gifts. Your instinct is to liquidate. You open the trading booth and sell the pets for coins, because coins buy more eggs, and eggs might hatch something better. You treat the Sunflower Gifts as junk to be opened immediately. By the end of your session you have a pile of coins, a few hundred diamonds, and zero materials left.

Then you walk up to the Combine-o-Matic and realize the Huges on the chain were sitting in the pets you just sold. Those “junk” garden pets were the raw material for Garlic Chick, Tomato Turtle, and Broccoli Dino. You traded a guaranteed Huge’s worth of material for coins that bought you eggs that hatched more junk you’ll sell again.

Why it happens: the merge chain isn’t labeled as a goal the way eggs are. Eggs have a big “HATCH” button and a visible pool. The Combine-o-Matic just looks like a recycling bin. So players sort it into the “sell” category in their head.

How to recover: pick a single Huge on the chain and feed toward it, starting now. Garlic Chick is the natural first target because it’s the earliest rung. Stop selling garden pets. Stop opening Sunflower Gifts as soon as you get them — bank them, because a stack of gifts is the exact currency the chain wants. You didn’t lose the Huge permanently; you just reset your material counter to zero. Rebuild it, and this time keep it in one pile.

Garden Eggs, the New Ladder, and Pet Variants

The garden got four new eggs, and the egg ladder now runs to Garden Egg 12. The headline is that Garden Egg 12 hatches the Huge Leek Lizard. There’s also a Mega Thorn Egg that hatches the Titanic Wistera Wyvern, at 0.100%. Read that number twice. One in a thousand. If you’re buying that egg hoping for the Wyvern, you’re buying a lottery ticket with a pretty wrapper.

The more useful thing hiding in the garden eggs is the variant system. The new garden pets can now hatch as Gold, Shiny, or Rainbow variants from any Garden Egg, and the rarest variant deals up to 5x base damage. That’s a real power spike, and it’s the cheapest one in the update because it comes from the eggs you’re already hatching.

There are eight new garden pets, from Corn Minotaur up to the top-tier Wistera Wyvern. For a player under Rebirth 6, a Rainbow variant of a mid-garden pet will move your coin income more than a Huge you can’t afford yet. A Huge is one strong pet. A full team of variant-buffed garden pets is a stronger coin farm, and coins are what fund everything else here.

Diamond Egg: It Expires, and That Changes Everything

The Diamond Egg is the update’s gem sink, and it has one mechanic that rewrites the usual “save vs. spend” math: it expires. Permanently. You buy it with diamonds, it’s only around for a limited window, and when it’s gone it’s gone. No vault, no second chance.

The pool is top-heavy. At the bottom you get a Diamond Penguin. Up from that, a Huge Diamond Penguin. Then a Titanic Diamond Penguin. And at the very top, the ultra-rare Titanic Diamond Capybara. The Capybara is the flex item of the event.

The expiration is the thing that makes people behave badly. A normal egg you can save toward. This one has a countdown on it, so players panic-buy near the end and dump diamonds they were saving for something better. We’ll handle that mistake in a second.

The decision rule is the same one you’d use for any gem spend: only put diamonds into the Diamond Egg if you’ve already funded the permanent upgrades you wanted. Permanent beats temporary, always. A diamond spent on a permanent damage upgrade is yours forever. A diamond spent on the Diamond Egg is a lottery ticket that vanishes with the event. If you’re still saving for an Upgrade Machine tier or a permanent stat, don’t touch the egg.

The Expired Egg Regret

This is the second classic blow-up, and it’s a cousin of the first one but it costs gems instead of pets.

You see the Diamond Egg in the shop, note that it’s limited, and file it under “I’ll grab it later.” You spend your session doing everything else — coin bosses, garden eggs, the merge chain. A week passes. You check the shop and the egg is gone. Now you want the Diamond Penguin, or you saw someone hatch the Titanic Capybara and you’ve convinced yourself you could’ve gotten it. You start asking in chat if the egg comes back. It doesn’t.

Why it happens: expiration isn’t visible enough, and “I’ll do it later” is a free pass your brain hands out for anything that isn’t urgent. The egg punishes exactly that.

How to recover: first, accept that the Titanic Capybara you’re imagining was a 0.1%-style longshot, not a near miss. You didn’t lose a Capybara; you lost a small chance at one. Second, check whether any of the egg’s pets matter for your actual build. The Diamond Penguin is a garden-variant-tier pet, not a Huge. If you’re mid-game, you dodged a gem sink, not a power spike. Third, if the egg is still up and you do want it, buy it now or budget for a fixed number of eggs, not “a few more” — the countdown makes every “one more” into a slippery slope.

Super Rebirth and the Garden Mission Gate

Super Rebirth is the new progression layer after Rebirth 6, and it’s the update’s long-game reward. The catch is that it’s locked behind three Garden Missions, and plenty of players hit Rebirth 6 and never look at them.

To unlock Super Rebirth you need Rebirth 6 plus all three Garden Missions completed: defeat the coins, harvest the crops, and accumulate the required rebirths. All three. No skips. The missions also hand out XP Tokens, so they’re not a dead-end grind — they pay while you clear them.

Once you’re in, Super Rebirth drops you into harder biomes with bigger rewards. It’s the same shape as a normal rebirth (reset your coins, keep your pets and items, get permanent strength), but the biome difficulty and payout both jump. If you’ve internalized the rebirth loop, Super Rebirth is just that loop with the difficulty knob turned up.

The trap is the missions themselves, which brings us to the third blow-up.

Rebirth 6 and Stuck

Here’s the scenario: you’re Rebirth 6, you’ve been grinding the garden for a week, and you keep hearing about Super Rebirth in chat but you can’t find the button. You assume it’s bugged, or that you’re missing a level, or that it’s not out for everyone yet.

It’s not bugged. You never finished the Garden Missions. They’re not cosmetic objectives — they’re the unlock. You’ve been treating them like side quests you’ll circle back to, and the game has been waiting for you to actually do them.

Why it happens: the missions sit in a separate tab from the rebirth statue, so nothing on the rebirth screen tells you they’re required. The game assumes you read the missions list. Most people don’t.

How to recover: open the Garden Missions, check the three requirements, and knock out whichever one you skipped. If you’ve been coin-farming, “defeat the coins” is probably done and “harvest the crops” is the one you never bothered with because crops felt like busywork. Do the crop one, bank the rebirth count if that’s the hold-up, and the Super Rebirth prompt appears. This is a five-minute fix once you know it’s not a bug. The lesson: in this update, the mission list is not flavor text. It’s the door.

Coin Bosses and Sunflower Gifts

The coin bosses tie the whole update together. Defeat enough coins around the map and a boss spawns. Kill the boss and it drops a pile of rewards plus Sunflower Gifts. The Sunflower Gift is the update’s swiss-army drop: open it and you can pull a Sunflower Hoverboard or a Trading Booth, or you can feed it straight into the Combine-o-Matic.

That last use is why gifts are currency, not loot. A Sunflower Gift is either a lottery scratch-off (open it) or a guaranteed merge-chain rung (feed it). The efficient play is to route gifts to whatever goal you committed to. If you’re chasing a Combine-o-Matic Huge, bank gifts and feed them. If you already have your Huge and want the hoverboard or booth, open them. Splitting the difference — opening some, feeding some — just makes both goals slower.

The coin bosses are also where the Gargantuan Rose Wolf lives. It’s back, it’s on the coin boss drop table, and it requires Rebirth 6. The probability is low, and the community’s trick is to run Better Luck and Rain potions before you farm bosses to tilt it. Rose Wolf is a “farm coins all event and hope” target, not a “grind for a weekend” target. Treat it as a passive lottery that pays out while you’re doing the missions and the merge chain anyway.

Every New Pet Worth Chasing

Here’s the full chase list, compressed. The important thing isn’t the number of pets — it’s which ones are actually reachable for a normal player.

The pattern to notice: the reachable stuff is on the Combine-o-Matic and the coin bosses. The eggs — Garden Egg 12, Mega Thorn, Diamond — are where the dreams live and the gems die. If you’re not rich, commit to the guaranteed chains and let the eggs be a small side bet.

The other new systems are quality-of-life and worth a quick note. The Fuse Machine merges duplicate pets to level them faster — a quicker spin on the fusion and evolution loop — which is a straight upgrade if you’ve been grinding the same hatch pool. The Boost Machine gives a temporary coin boost. The new Plasma Seed crop grows a chest full of coins. The Upgrade Machine now goes to 20 tiers. And Sunflower Boosts add +10%, +20%, or +30% more sunflowers. None of these change your routing; they make whatever you’re already doing pay more.

Feed, Sell, or Save: A Decision Rule

Every pet and gift you earn this update lands in one of three buckets, and the whole event is just you sorting things into the right one. Here’s the rule.

Is it on your current merge chain? If you’re chasing a Combine-o-Matic Huge, then any garden pet or Sunflower Gift that can be fed is “feed.” Don’t sell it, don’t open it. It has a guaranteed job.

Is it a duplicate you already have at max? Then the Fuse Machine is your answer, not the auction house. Merging duplicates for levels beats selling them for coins in almost every case, because coins buy eggs and eggs are a lottery, while levels are permanent.

Is it a diamond you can’t spare? Then “save” wins over the Diamond Egg. Fund permanent upgrades first. The egg expires on purpose to make you rush — that’s the game playing you.

Is it a pet you won’t feed, won’t fuse, and don’t need? That’s the only thing that should hit the trading booth. Sell the true excess, keep the material.

The players who clean up in Plant & Combine aren’t the ones who hatched the luckiest egg. They’re the ones who never fed a merge-chain pet to the auction house and never panic-bought an expiring egg. Sort every drop into feed, fuse, save, or sell — and this update pays you for the discipline instead of punishing the opposite.