A key component of the limited-time Halloween event, Frankentteo is a monster-themed Secret-rarity brainrot. It costs 175,000,000 dollars and generates an income of 700,000 dollars per second. This brainrot is essential for players aiming to acquire the ultra-rare La Spooky Grande.

Appearance
Frankentteo is a spooky redesign of the Matteo brainrot, transformed into the classic Frankenstein’s monster. While retaining the base model of Matteo, its appearance is heavily altered:
- Its skin is a pale, sickly green.
- Visible stitches run across its face and forehead.
- It wears a tattered purple jacket and brown pants.
- Large metal bolts stick out from the sides of its head.
- A special idle effect causes electric sparks to occasionally crackle near its head.

Stats & Efficiency
This event-exclusive brainrot has a solid efficiency rating, making it a valuable character both on its own and as a crafting component.
| Stat | Value |
|---|---|
| Base Cost | 175,000,000 dollars |
| Income per Second | 700,000 dollars |
| Efficiency | 0.40% |
(Price Format Key: K = 1,000; M = 1,000,000; B = 1,000,000,000)
How to Get
Frankentteo is only available during the “Witching Hour,” a special event that occurs every two hours.
- Witching Hour Event: During this limited window, one of four unique Halloween brainrots has a chance to spawn on the red carpet. Players must be present and ready to purchase Frankentteo if it appears.
- Stealing: It can also be stolen from another player’s base.

Trivia
- This brainrot is one of the four required components needed to fuse together and claim the limited-edition La Spooky Grande.
- This is the second time a version of Matteo has been used as a component for a grand prize; an “Extinct” variant of Matteo was previously required to obtain the La Extinct Grande.
- The name is a portmanteau of “Frankenstein” and “Matteo,” and is pronounced “Frank-En-Tay-Oh.”
Mutation Income Table
The income for Frankentteo can be significantly boosted by applying various mutations.
| Mutation | Multiplier | Income/sec | Income/hour |
|---|---|---|---|
| Default | 1x | $700.0K | $2.5B |
| Gold | 1.25x | $875.0K | $3.1B |
| Diamond | 1.5x | $1.0M | $3.7B |
| Rainbow | 10x | $7.0M | $25.2B |
| Bloodrot | 2x | $1.4M | $5.0B |
| Celestial | 4x | $2.8M | $10.0B |
| Candy | 4x | $2.8M | $10.0B |
| Lava | 6x | $4.2M | $15.1B |
| Galaxy | 6x | $4.2M | $15.1B |
| YinYang | 7.5x | $5.2M | $18.9B |
