Because it is a fan game, it operates in a legal gray area. As a result, you will find it on official storefronts like Steam, the Nintendo eShop, or the Epic Games Store. Instead, the Super Smashy Maker download is hosted on community platforms like Itch.io , Game Jolt , or the developers’ own Discord server.
Note: Some community forks add online multiplayer or more characters, so requirements may vary. Super Smashy Maker Download