It sounds like you're referring to a game project based on Sonic Battle (the 2003 GBA fighting game), possibly with "HD Deluxe Edition" as a custom build name.
: It is primarily a PC fan game, released in late 2022 with ongoing updates through 2024 and 2025. The Deluxe Roster sonic battle hd deluxe edition mugen hot
Recent "Hot" updates to the game have introduced unique content that pushes the boundaries of traditional Sonic media: It sounds like you're referring to a game