Creature Page

Little Mouser

A purple rat thief that can steal objects and creatures from Yoshi's back.

Last updated: 2026-05-24

Settled Valley Walkthrough Flower Checklist
Little Mouser guide artwork

Quick Summary

Chapter

Settled Valley

Habitat

Little Mouser Nest

Role

Thief

Type

Creature

Main behavior

Little Mouser is the thief for Little Mouser Nest. Let the creature steal once, then follow it.

Book Description

A purple rat thief who can steal objects and creatures from Yoshi's back.

Discoveries to Test

  • Confirm the Little Mouser Nest book entry by watching how Little Mouser behaves before leaving the area.
  • A purple rat thief who can steal objects and creatures from Yoshi's back.
  • Replay the habitat around this focus: Theft, chase routes, and recovery.

Related Smiley Flowers

  • Little Mouser Nest (6 Smiley Flowers)
  • Settled Valley Smiley Flower checklist
  • Settled Valley walkthrough cleanup route

Linked Discovery Notes

Big Discovery Follow the Little Mouser Theft Route Let Little Mouser take an item once, then follow the route to see whether it opens a hidden discovery or cleanup path.

Completion Notes

  • The page artwork uses the matching local 1200px WebP card image for Little Mouser.
  • Replace this draft route note with the exact in-game trigger once the book entry has been verified.
  • Check the chapter page, discovery list, and Smiley Flower checklist together before marking the creature complete.

Related Guides

Settled Valley Walkthrough

Read the full Settled Valley chapter route and habitat checklist.

Settled Valley Smiley Flowers

Check the flower table for the chapter where this creature appears.

Discoveries Guide

Review discovery actions and hidden route tests.