pf2e.fyi
From Pathfinder Society Scenario #5-12: Mischief in the Maze, which isn't enabled.

Topiary Monster

CREATURE 3
Perception +9; low-light vision
Skills Athletics +10, Intimidation +10, Stealth +9 (+11 in forests)
Str +5, Dex +3, Con +4, Int -4, Wis +0, Cha +1

AC 19; Fort +12, Ref +9, Will +6
HP 45; Weaknesses fire 3; Resistances piercing 6

Speed 25 feet
Melee Branch +12, Damage 1d10+5 piercing
Functional Form

Depending on the creature it resembles, the topiary monster gains additional abilities.

Mantis The branch Strike is agile and has reach 10 feet. On the first round of combat, creatures that haven't acted are Off-Guard to the mantis topiary monster.

Owlbear The branch Strike is agile and has the Grab action.

Unicorn The branch Strike is deadly 1d6 and has the Knockdown action.

Intimidating Display

When using Intimidation to Demoralize a target, a topiary monster doesn't take a penalty for not speaking the same language as the target.

Grab (Owlbear Form Only)

Requirements The monster's last action was a successful Strike that lists Grab in its damage entry, or the monster has a creature Grabbed or Restrained

Effect If used after a Strike, the monster attempts to Grapple the creature using the body part it attacked with. This attempt neither applies nor counts toward the creature's multiple attack penalty.

The monster can instead use Grab and choose one creature it's grabbing or restraining with an appendage that has Grab to automatically extend that condition to the end of the monster's next turn.

Knockdown (Unicorn Form Only)

Requirements The monster's last action was a successful Strike that lists Knockdown in its damage entry

Effect The monster attempts to Trip the creature. This attempt neither applies nor counts toward the monster's multiple attack penalty.

Pathfinder Society Scenario #5-12: Mischief in the MazeOGL