Boo is a Premium Box Tsum Tsum. She was first introduced during the Japan Event Collecting Energy (August 2018) and the International Event Collect Energy (June 2019). For a limited time on the Japanese version only, when she was first introduced, she was also a voice Tsum Tsum.
Boo will create doors constantly moving along a rail. Tap one of the three different doors for a different Skill Effect. Her base time is 3.5 seconds.
- Tapping a blue door will summon Sulley and turn all Boos into large Sulley Tsum Tsum for a short time. This is definitely effective for creating long chains as more and more Boos turn into Sulleys, creating a long chain.
- Tapping a green door will summon Mike and turn all Boos into tiny Mike Tsum Tsum for a short time. This is very similar to Wonderland Alice's Skill.
- Tapping a pink door will clear all Boos and they won't reappear for a short time.
- She will also count for Initial "M" missions as her real name is "Mary".
- Even though Boo doesn't have a visible mouth on her face, she still counts as a mouth Tsum Tsum, because she is wearing a suit consisting of a mouth to disguise herself.
- Although Boo's eyes do not have visible whites, she still counts as a white eye Tsum Tsum, because the fake eyes on her suit have visible whites.
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