Max Games has a line of Fire Emblem: Three Houses and Super Mario-themed Switch accessories. The Fire Emblem: Three Houses lineup includes a Smart Pouch and Game Card case. The pouch is made of highly durable EVA material and contains slots for up to three game cards. The Game Card Case is a book-style case that stores up to 24 game cards.
The Super Mario-themed content includes Smart Pouches and Game Card Cases. These products have exactly the same specs as the Fire Emblem line.
The entire run of Fire Emblem: Three Houses and Super Mario-themed cases and pouches will hit Japan on July 26th, 2019.