You can find TM86 Grass Knot behind the Fortree City Gym. The path to the TM can be accessed by following the narrow path on the left side of the Gym.
However, you’re also going to need the Devon Scope to get past the invisible Kecleon blocking the path to the Gym in the first place.
TM86 Grass Knot Location (Step-by-Step)
When you first arrive at Fortree City, an invisible Kecleon blocks the path to the Gym.
To get past it you’ll need the Devon Scope, a Key Item given to you by Steven on the bridge at Route 120.
If you already have a Devon Scope, then head back to Fortree City’s Pokémon Center and we’ll show you how to reach this TM.
Step 1: Make your way east and climb the nearby ladder leading to the treehouse.
Step 2: From the treehouse platforms, head east by crossing the connecting bridges.
Step 3: On the third treehouse counting from the left, climb down the ladder. You should see a golden Poké ball on the ground as you climb down.
Step 4: After getting down, reveal the Kecleon blocking your path with the Devon Scope (or if you’ve already done this then skip ahead).
Step 5: Make your way to the Gym’s left side, and then pass through the opening all the way on the left. Continue along this hidden path going north.
Step 6: Once you reach the end of the path you can pick up the TM for Grass Knot.
TM86 Grass Knot Details + Uses
|Grass Knot Move Details|
|PP||20 (max. 32)|
Grass Knot is a Special Grass-type move possessing a variable base power, ranging from 20 to 120. The move’s base power depends on the target’s weight – so the heavier the target, the more damage it deals.
Here’s how Grass Knot’s power is calculated:
|Target’s Weight||Base Power|
|0.1 – 9.9 kg||20|
|10 – 24.9 kg||40|
|25 – 49.9 kg||60|
|50 – 99.9 kg||80|
|100 – 199.9 kg||100|
|200 kg or more||120|
Grass Knot’s variable base power, which depends on the weight of the opposing Pokémon, makes it very inconsistent and unreliable. When you’re up against an opponent weak to Grass-type moves but they aren’t really heavy, Grass Knot may not be powerful enough to secure an OHKO.
As a Special Grass-type STAB (Same Type Attack Bonus) move, Grass Knot might not be the best choice.
More reliable Grass-type STAB moves are out there – such as Energy Ball, with its consistent 90 base power. These other moves tend to deal more damage on average.
Or if you have a Sun Team, running Solar Beam instead is a no-brainer.
However, Grass Knot can still be quite useful as a coverage move. Non-Grass-type Pokémon like Raichu, Samurott, and Delphox can all learn the move, making it an unexpected addition to their movesets that your opponents might not anticipate.