You transform into the battle form of a Tiny animal such as a cat, insect, lizard, or rat.
Concentrate
Manipulate
Polymorph
Rank
1
Traditions
Arcane, Primal
Traits
Concentrate, Manipulate, Polymorph
Cast
2 actions
Duration
10 minutes
You transform into the battle form of a Tiny animal such as a cat, insect, lizard, or rat. The specific type has no effect on your Size or statistics. While in this form you gain the animal trait and can't make Strikes, and you can Dismiss the spell. You gain AC = 15 + your level, ignoring your armor's check penalty and Speed reduction; Speed 20 feet; weakness 5 to physical damage; low-light vision and imprecise scent 30 feet; and Acrobatics and Stealth modifiers of +10 unless your own are higher, with an Athletics modifier of -4.
Heightened
4th
You can turn into a flying creature, such as a bird, which grants you a fly Speed of 20 feet.
Source: Pathfinder Player Core, p. 348
Bring Pest Form into a Pathfinder 2e game with The DM Screen.