Little Sister requested that we create the mushroom guardian in PF1e. I was about to say that it was converted over, but then I remembered that it was a convert from D&D 5e and not Pathfinder 1e, that I have never created this monster in the original edition. So I took a few moments and created this little guy in the great game. Enjoy.
As always, check out our PF1e products at DriveThruRPG, Paizo, and the Open Gaming Store.
Mushroom Guardian CR 1/4
XP 50
N Tiny Construct
Init +0; Senses darkvision 60 ft., low-light vision; Perception +2
Defenses
AC 12, touch 12, flat-footed 12 (+2 size)
hp 5 (1d10+1)
Fort +1, Ref +0, Will +2
Immune construct traits
Weaknesses vulnerable to slashing
Offense
Speed 15 ft.
Melee slam +0 (1d3–2)
Special Attacks spore cloud (DC 11)
Statistics
Str 6, Dex 11, Con 12, Int —, Wis 14, Cha —
Base Atk +1; CMB –4; CMD 6
Languages Understands Draconic (cannot speak)
SQ toadstool appearance
Ecology
Environment any
Organization any
Treasure none
Special Abilities
Spore Cloud (Ex) The mushroom guardian exhales a cloud of spores in a 5-foot radius. All creatures in the area must succeed a DC 11 Fortitude save or begin sneezing so hard that the creature is dazzled for 1 round.
Toadstool Appearance (Ex) When not moving, a mushroom guardian is indistinguishable from an ordinary mushroom.
Jon Brazer Enterprises 
Oh, thank you so much for taking the time to do this – I for sure have just the campaign that these little guys will be great for!