From IdleOn MMO Wiki

What Mousey is used in
Big Critter Pouch.png Big Critter Pouch 15,000 Smithing
Spikemouth Stamp.png Spikemouth Stamp Lots Stamps More Info.
OrangeBubble14.png Buff Boi Talent Lots Alchemy Bubble More Info.
Vial-level-1.png Bubonic Burp 1.1 B Alchemy Vials More Info.
Refinery.png Purple Salt Lots Refining
Salt Lick.png Salt Lick 81.8 M Construction
Lord of the Hunt.gif The Mouse n the Molerat 1,000 Quests