Sonic Mania Switch Nsp (eshop) -

The "Plus" expansion, available on the eShop for roughly $29.99 (for the full bundle), adds substantial content:

: Technical analyses from Digital Foundry noted slight frame rate dips only during the 3D Special Stages. Sonic Mania SWITCH NSP (eShop)

: Mighty the Armadillo (high defense/slam attack) and Ray the Flying Squirrel (gliding mechanics). The "Plus" expansion, available on the eShop for roughly $29