Meow Meow

Meow Meow is a Rare Costume for $π$ released alongside. It is obtainable by purchasing the Limited! Halloween Special Costume Package, which also contains.

Story
''Wearing a cat hat crafted from spare cloth hidden among the overflowing pules of fabrics, Black Pinnypine took on an unusual demeanor. It sits by the window on moonlit nights, meowing as if casting a spell, transforming Cookies, who has touched the pins, into cats!''