The Gym Gains update in Plants vs Brainrots turns the Central Island into a weight room and your spare brainrots into workout fuel. Instead of chasing timers or rare spawns, you feed brainrots of specific weights to an NPC who bench presses them and hands back rewards on a 25-tier track.
Where Gym Gains is and how long it lasts
Gym Gains runs for one week. It went live on January 3, 2026, and is scheduled to be replaced on January 10–11, 2026, depending on your time zone.
The event takes place on Central Island, which you reach via the portal to the left of the Brainrot Spawner in your main area. On Central Island, head to the gym-themed building called Planet Freshness, located directly behind the Fireworkino structure. Inside the gym, you’ll see the Gym Gains event board, the NPC doing bench presses, and a large red submission button. That button is the core of the event.
How the Gym Gains event works
Gym Gains is built around brainrot weight, not rarity, mutation, or DPS. Each tier requires you to submit one brainrot whose listed weight falls inside a target range shown above the red button.
When a submission is valid, the NPC performs a bench press, your tier counter moves up by one, and you immediately receive that tier’s rewards. The required weight range then shifts upward for the next submission, mimicking a progressive overload workout routine.
Key behavior to keep in mind:
- Any brainrot type works as long as its weight is within the displayed kilogram range.
- The button changes color when you hover a valid brainrot; players use this as a quick check that the weight is acceptable.
- There are 25 total submissions per run. Clearing all 25 unlocks the full reward track.
- After Tier 25, you can pay in-game cash to reset the track and run it again.
All Gym Gains reward tiers and weight ranges
Each Gym Gains tier is defined by a brainrot weight band and a fixed set of rewards. You only need one brainrot per tier.
| Tier | Required brainrot weight (kg) | Rewards |
|---|---|---|
| 1 | 5.25 – 11.25 | Money |
| 2 | 5.75 – 11.75 | Money, 2× Premium Water Bucket |
| 3 | 6 – 12 | 4× EXP Bottle, Money |
| 4 | 6.25 – 12.25 | 4× Frost Grenade, 1× Orcalero Orcala |
| 5 | 6.5 – 12.5 | 1× Sunflower Seed, 1× Shiny Expansion Card, 1× Las Tralaleritas |
| 6 | 6.75 – 12.75 | 1× Pre Workout |
| 7 | 7 – 13 | Money, 1× Las Tralaleritos |
| 8 | 7.5 – 13.5 | 1× Fire Potion, 1× Dead Lift Drop |
| 9 | 8 – 14 | Money, 1× Sunflower Seed |
| 10 | 8.5 – 14.5 | Money, 1× Dragonfruit Seed, 4× Frost Grenade |
| 11 | 9 – 15 | 1× Fireworkk Bazooka, 1× Bandito Borborito |
| 12 | 9.5 – 15.5 | 1× Aerillino Armadillo |
| 13 | 10 – 16 | 3× EXP Pot, 1× Sunlower Seed |
| 14 | 10.5 – 16.5 | Money |
| 15 | 11 – 17 | 6× Premium Water Bucket, 1× Dragonfruit Seed |
| 16 | 11.5 – 17.5 | 1× Deadlift Drop, 1× Bombini Gusini |
| 17 | 12 – 18 | 1× Shiny Base Card Pack, 5× EXP Bottle |
| 18 | 12.5 – 18.5 | Money, 1× Eggplant Seed |
| 19 | 13 – 19 | Money |
| 20 | 13.5 – 19.5 | 1× Pre Workout |
| 21 | 14 – 20 | Money, 1× Eggplant Seed |
| 22 | 15 – 21 | 1× Bottelini, 2× Size Potion |
| 23 | 16 – 22 | 1× Witch Potion |
| 24 | 17 – 23 | 2× EXP Star, Money |
| 25 | 18 – 24 | 1× Buff Spinacclo Seed, 1× Gymbroini Sigmalini, 1× Pickup Pot |
Beyond the headline items at Tier 25, the track is valuable for repeated staples: money injections, EXP items, water buckets, and a spread of seeds and gear.
How to start and finish a Gym Gains run
Step 1: Reach Central Island using the portal to the left of the Brainrot Spawner in your main area. Once you arrive, walk to the Planet Freshness gym behind Fireworkino and interact with the Gym Gains event board to unlock the track.
Step 2: Stand by the red submission button inside the gym and read the weight range displayed above it. Open your brainrot inventory and locate any brainrot whose weight falls inside that range.
Step 3: Submit the selected brainrot. The NPC will perform a bench press animation, your tier counter will increment, and you’ll see your rewards added instantly to your inventory or balance.
Step 4: Repeat submissions for each new weight range until you reach Tier 25. The range increases gradually, from roughly mid–5 kg up to 18–24 kg at the final tier.
Step 5: After clearing Tier 25 and claiming Buff Spinacclo, Gymbroini Sigmalini, and Pickup Pot, interact with the Reset option on the event board if you want to rerun the track. The reset cost is $100,000,000 in-game cash, and it returns the track to Tier 1 so you can earn all rewards again.
Efficient ways to find the right brainrot weights
The main friction point in Gym Gains is not the fights; it’s managing brainrot weights efficiently. A few practices make the process much faster.
Turn off Auto Sell before you dive into the event. You want a wide spread of brainrot weights in your inventory instead of watching them auto-convert to cash. Disable auto-selling for standard drops and mutations so they accumulate.
Use inventory search by number. The brainrot inventory supports numeric search. Typing a value like 10.5 or 13 filters down to weights around that number. For example, if you need 6.5–12.5 kg, entering any integer between 7 and 12 tends to show candidates that fall in-range.
Leverage the button color as a sanity check. When you hover a candidate brainrot near the submission button, the button turns green if the weight is acceptable and stays red if it isn’t. This makes it safe to “spam” through low-value brainrots at early tiers without micromanaging numbers.
Early tiers with low ranges let you burn through weak brainrots quickly. As ranges climb into the teens, it’s worth searching precisely to avoid sacrificing anything you want to keep for your main lineup or trading.
Notable event items: Pickup Pot, Pre Workout, and Deadlift Drop
Gym Gains introduces several items that change how you play outside the event itself.
Pickup Pot arrives at Tier 25 and lets you temporarily uproot a plant and carry it around in a pot while it continues firing. Once equipped and used on a plant, you can reposition it to wherever the action is heaviest. The effect lasts for a short burst, roughly in the 20–30 second range, turning any plant into a mobile turret. Because only the carried plant is dealing damage while you isolate it, Pickup Pot also doubles as a way to funnel XP into a specific plant.
Pre Workout is a consumable that “energizes” brainrots. Using it increases how many brainrots attack at once and likely boosts their movement speed. Functionally, it behaves like a stronger version of riot-style potions, trading safety for higher kill volume and faster farming. The event hands you Pre Workout at Tier 6 and again at Tier 20, and it’s also relatively easy to earn on repeated runs.
Deadlift Drop is a throwable, weight-themed explosive. Placing it on the ground causes a delayed detonation that both damages and stuns nearby brainrots. It works like a hybrid between a bomb and a freeze grenade: drop it into a cluster, watch it slam down, and use the stun window to clean up safely or protect fragile plants. The event grants Deadlift Drop at Tier 8 and Tier 16.
Gymbroini Sigmalini and the Buff Spinacclo seed
The Tier 25 package is the main reason to finish a run instead of stopping early.
- Gymbroini Sigmalini is a new brainrot themed around the gym event. You can unlock multiple variants, including wrapped and gold versions, but any version is functionally a permanent memento that also contributes to your roster.
- Buff Spinacclo Seed unlocks a new plant with a gym-flavored identity. Planting and leveling Buff Spinacclo folds another limited-time option into your buildcrafting, especially in runs where you want event synergy or simply enjoy collecting every plant.
- Pickup Pot rounds out the trio as a reusable tool that changes positioning and XP routing for your plants.
Because the track can be reset, these Tier 25 rewards are technically farmable. That said, the $100,000,000 reset price means the loop makes the most sense once you can comfortably generate large amounts of cash from endgame brainrots and well-optimized gardens.
Practical prep before diving into Gym Gains
A bit of setup keeps Gym Gains from interrupting your normal progression.
Step 1: Audit your Auto Sell rules and disable automatic selling for at least common and uncommon brainrots before you travel to Central Island. This ensures you stockpile a broad curve of weights as you farm.
Step 2: Mark high-value brainrots as favorites so you don’t accidentally feed them into the gym. Favoriting keeps them visually separated when you are speed-clicking through low-value options near the button.
Step 3: Equip high-damage plants and useful gear such as Frost Grenades, Riot-style potions, or Pre Workout for your regular brainrot farming sessions. Faster kills translate into more drops and, therefore, more options for each weight range.
Step 4: Treat your first Gym Gains run as a discovery pass. Use it to feel out how quickly the weight band escalates and which parts of your inventory you are comfortable sacrificing. On later passes, you can start hoarding specific ranges if you care about optimizing cash or EXP per sacrifice.
Gym Gains is intentionally lightweight: 25 sacrifices, rising weight thresholds, and a straight reward track that never asks you to stop and solve a puzzle. With Auto Sell disabled, a healthy pile of brainrots in different weight brackets, and a bit of care around your favorite units, it becomes a low-stress way to pick up new gear, seeds, and one of the more entertaining utility items in the game.
