Just download it from the eShop.
Before Sonic X Shadow Generations launched on 25th October 2024, Sega ran a promotion in which it gave away a free Sonic Jam character skin to those who signed up to the company’s emails.
Well, that promotion is long gone now, and Sega has decided to offer the skin to all owners of Sonic X Shadow Generations, regardless of platform (thanks, Sonic Stadium).
Read the full article on nintendolife.com
