Tracking/Shed Hunting

You can train a Poke to track the scents of sheds from bug types, reptiles & other Pokes like meowth  & paras

they can also track people, lost items, and biological items (berries etc)

to find hidden, non-biological items, a dowsing rod (app?) and pokemon with dig is required

(meowth specifically shedding the coin on its forehead). You can sell sheds for money & use them to track big Pokes

FEATHERS TOO

Trackable Poke & drops:

Caterpie Line Shed Skins

Weedle Line Shed Skins

Pidgey Line Feathers

Spearow Line Feathers

Ekans Line Shed Skins

Sandshrew Line Shed Scales

Paras Tiny Mushrooms

Diglett Line Tunnels

Meowth Coins

Farfeth'd Leeks

Grimer Line Sludge

Shellder Line Shells & Pearls

Onix Rocks

Krabby Line Shed Skins

Marowak Graves

Scyther Shed Skins

Pinsir Shed Skins

Magikarp Scales

Legendary Birds Feathers

Dratini Line Shed Skins

All Pokes with footsteps

Tracking Poke:

Rattata & Raticate

Pikachu & Raichu

Sandshrew & Sandslash

Nidos

Vulpix + Ninetails

Persian

Mankey + Primeape

Growlithe + Arcanine

Abra + Kadabra + Alakazam

Slowpoke + Slowbro

Drowzee + Hypno

Cubone + Marowak

Lickitung

Rhyhorn + Rhydon

Electabuzz

Magmar

Tauros

Eeveelutions

Dratini + Dragonair + Dragonite