Mimi

From Paper Wiki

Mimi is a shapeshifter in Super Paper Mario.She has posed as merlon and merlee. When mimi shows her true form for the first time, it's when catch up with her.She spins her head and screams mimimimimimimimimimi over and over again when she transforms into her true form.She looks like a giant spider with 12 legs at least.Her attack is spiting rupees at you.It is best to be Peach(use her umbrella sheild to protect yourself from the rupees),and have Thoreau as your pixl(to throw the rupees back at her).