Open Season

Mushroom 1: After the skunks become your buddies, go to the shoreline in the grub area. Sniff this badge out.
Mushroom 2: In Scare Bear, Sniff behind the first hunter's cabin.
Mushroom 3: In Scare Bear, sniff in the clearing.
Mushroom 4: In hunted, when you surprise the hunters with the squirrel, throw elliot into the gap.
Mushroom 5: In hunted, when you're tasked with getting to the top of the mountain and you gas the hunters, sniff around.
Mushroom 6: After Mushroom 6, go to the bridge and sniff down the path to the right.
Mushroom 7: In Hunted, after you scare the hunter in the cave with a rabbit, smell and throw elliot into the air at the next right turn.
Mushroom 8: In the first part of Crazy Quackers, smell and walk up the left of the shore.
Mushroom 9: In the second part of Crazy Quackers, Swim to the island on the right of the lake when smelling.
Mushroom 10: In the second part of Crazy Quackers, smell by the path to the truck.


*Credit goes to Manatee from x360a.com