All Forbidden Brainrots in Plants vs Brainrots

Plants vs Brainrots currently has nine Forbidden Brainrots, and the one most players should chase first is Forbidden Tralalero Tralala — it has the cheapest, most repeatable unlock route (the Anomaly Altar fusion) and pays 9,000 currency per minute, which is enough to self-fund every other Forbidden unlock in the tier. The single most valuable is Forbidden La Vaca Saturnita at 47,000/min, but it is gated behind the Ring Event and a 30–40 hour grind, so it is a goal, not a starting point.

Every figure below is a base value taken from the in-game Index and the 2026 balance patch notes. The developers adjust income multipliers most patches, so treat the numbers as reliable ranges rather than constants — the unlock methods change far less often than the payout values do.

The Forbidden tier at a glance

Forbidden Brainrots sit above Secret tier. They are the only units that cannot be pulled from the standard gacha pool, which means every one of them has a fixed source: a fusion, a raid, a timed event, or a rare spawn window. That is why the tier feels slower to fill than Legendary or Mythic — you are farming a specific trigger, not rolling dice.

Every Forbidden Brainrot and how to unlock it

Forbidden Tralalero Tralala

The entry point to the tier. You need three Mythic Tralalero Tralala copies and one Anomaly Shard, then you fuse at the Altar during a Corruption surge — fusing outside a surge fails and consumes the shard. Because Mythic Tralalero is common in the mid-game pool, this is the only Forbidden most players can realistically build in a single evening. Its 9,000/min is unimpressive next to the Titan, but it is the unit that pays for everything else.

Forbidden Tung Tung Tung Sahur

No team, no ritual, no currency sink — just presence. The Sahur only spawns during the night cycle between in-game 02:00 and 04:00, and the spawn roll is roughly 1 in 2,500 per tick. The efficient method is to park your character in a cleared lane, keep the game window active (idle detection suspends night spawns), and let it roll. Solo players with limited playtime should start here.

Forbidden Bombardiro Crocodilo

Drops from the Airstrike event at roughly 1 in 4,000. Because it is also the fusion material for Bombombini Gusini, most experienced players hoard three copies rather than keeping one in a lane. Do not fuse your first copy — a single Bombardiro at 14,500/min out-earns two mid-tier Legendaries and holds its lane against wave 30.

Forbidden Brr Brr Patapim

Frozen Vault is a three-player minimum raid, and the Patapim drops from the vault chest rather than the boss, so a full clear is not required — you only need to survive to the chest room. Its lane-wide slow is the single best defensive tool in the tier, which matters more than its income once you are pushing past wave 45.

Forbidden Chimpanzini Bananini

Built at the Banana Grove by sacrificing three Epic banana-family units. The sacrifice is permanent, so never feed it units you still use. Its value is not its own 22,500/min but the +25% aura: placed between two high-income Forbidden units it effectively adds 25% to both, which is why veteran players treat it as infrastructure rather than a fighter.

Forbidden Cappuccino Assassino

Pure gamble. Each Espresso Machine pull costs roughly 5,000 currency and the Assassino rate is low, so budget 300,000–500,000 currency before you commit. The payoff is the highest crit multiplier in the game against single targets, making it the pick for PvP and boss lanes rather than passive farming.

Forbidden Lirilì Larilà

Only obtainable while the Melody Event is live, and the event returns on an irregular schedule. If the event is running, drop everything and farm it — this is the one Forbidden Brainrot with genuine availability risk. Its charm effect disables enemy specials, which is what makes the Ring Event survivable in the first place.

Forbidden Bombombini Gusini

Requires fusing three Forbidden Bombardiro Crocodilo, which is a real cost — see the calculation below. In exchange you get a lane nuke on a cooldown and a passive that boosts Bomb-family income by roughly 12%, which softens the loss considerably.

Forbidden La Vaca Saturnita

The Titan. One clear of the Ring Event per cycle, and the event itself only unlocks once you can hold a lane past wave 50. Everything about this unit is a long-term project: you need the Lirilì Larilà to survive the event, the Bombombini to clear the wave requirement, and roughly 30–40 hours of accumulated farming. It is the best income unit in the game at 47,000/min and there is no shortcut.

Which Forbidden Brainrot should you farm first?

The right first target depends entirely on how you play, not on which unit has the biggest number.

Worked example: is the Bombombini fusion actually worth it?

On raw income, fusing looks like a mistake. Run the numbers on base values:

• Three Forbidden Bombardiro Crocodilo kept in lanes: 3 × 14,500 = 43,500/min
• One Forbidden Bombombini Gusini: 38,000/min base
• Apply its Bomb-family passive, roughly +12%: 38,000 × 1.12 = 42,560/min
• Net loss: about 940/min, or roughly 56,400 currency per hour

So the fusion costs you about 56,400 currency an hour. Now compare that against what it unlocks. Clearing the wave-50 lane requirement for the Ring Event typically takes around six hours of attempts, which means you forgo roughly 940 × 60 × 6 = 338,400 currency in that window. La Vaca Saturnita pays 47,000/min against Bombombini’s 38,000 — a gain of 9,000/min. At 9,000/min, you recover 338,400 currency in about 38 minutes of holding the Titan in a lane.

That is the whole argument: the fusion loses you 940/min permanently and pays back the entire six-hour grind in well under an hour. Fuse as soon as you have the third Bombardiro — but not before, because two Bombardiro in lanes beat one Bombombini on raw income and you will stall on the wave requirement.

The most efficient unlock order, step by step

1. Build Forbidden Tralalero Tralala first. Reason: it is the only Forbidden you can realistically get in one session, and its 9,000/min turns every subsequent grind into a funded grind rather than a currency-starved one.
2. Park for the Tung Tung Tung Sahur overnight or during low-attention sessions. Reason: the spawn is time-gated, not effort-gated, so it costs you nothing to run alongside another farm. Never grind it actively — that is wasted playtime.
3. Farm Bombardiro Crocodilo until you have three copies, and do not fuse any of them yet. Reason: the copies earn 43,500/min combined while you work on the raid tier, and you need the third copy as fusion material later anyway.
4. Run Frozen Vault with your squad for Brr Brr Patapim. Reason: the chest room is the only requirement, so you can attempt it before you can full-clear the raid, and the lane-wide slow is what carries you to wave 50.
5. Feed three spare Epic banana units to the Banana Grove for Chimpanzini Bananini. Reason: its +25% aura compounds with every Forbidden you place afterward, so the earlier you build it, the more total value it produces over your account’s life.
6. Only then start Espresso Machine pulls for Cappuccino Assassino. Reason: it is a currency sink with no guaranteed return. Pulling before your income base is stable is the single most common way players stall out in the mid-game.
7. Drop everything when the Melody Event goes live. Reason: Lirilì Larilà’s charm effect is effectively mandatory for surviving the Ring Event, and the event window closes.
8. Fuse Bombombini Gusini, then push the Ring Event for La Vaca Saturnita. Reason: the fusion is the gate to wave 50, and the Titan is the end of the progression line.

Frequently Asked Questions

What are Forbidden Brainrots in Plants vs Brainrots?

Forbidden Brainrots are the tier above Secret — the nine units that cannot be obtained from the standard gacha pool. Each one has a fixed source such as a fusion ritual, a raid chest, a timed event, or a rare night-cycle spawn. They are the only units in the game with a dedicated combat role on top of their income, which is why they dominate both farming and wave defence.

Which Forbidden Brainrot is the rarest?

Forbidden La Vaca Saturnita is the rarest by availability rather than by drop rate — the Ring Event can only be cleared once per cycle and requires a wave-50 lane. Forbidden Lirilì Larilà is the rarest in practical terms, because it is only obtainable during the Melody Event’s roughly two-week window and the event does not run continuously.

Can you get Forbidden Brainrots without spending Robux?

Yes — all nine have free unlock routes. The Anomaly Altar fusion, night-cycle spawn, Airstrike spawn, Banana Grove ritual and Bomb Fusion require only in-game currency and time. The Espresso Machine is the one route where paying accelerates things dramatically, but the Assassino still drops for free at a low rate.

Which Forbidden Brainrot makes the most income?

Forbidden La Vaca Saturnita at 47,000/min base, with Forbidden Bombombini Gusini second at 38,000/min before its Bomb-family passive is applied. Forbidden Chimpanzini Bananini is the dark horse — its own 22,500/min is mid-tier, but the +25% aura it gives to two adjacent high-income Forbidden units can effectively out-earn a Titan in a well-built lane.

Do Forbidden Brainrots get removed or rotated out?

The permanent ones — Tralalero Tralala, Tung Tung Tung Sahur, Bombardiro Crocodilo, Brr Brr Patapim, Chimpanzini Bananini and Cappuccino Assassino — have stayed in the Index across recent patches. Lirilì Larilà is tied to the Melody Event, and La Vaca Saturnita to the Ring Event, so those two are effectively unavailable between event cycles.

Should I keep duplicates or fuse them?

Keep duplicates until you can clear the content that fusing unlocks. Three Bombardiro copies earn more per minute than one Bombombini, so the fusion is only correct once you are actively pushing for the Ring Event — at that point the fusion pays for itself in under an hour of holding the Titan, as the calculation above shows.