The EU and JP manuals are located at https://manuals.sega.com/sega-ages/ They contain nice HD versions of the game logos. But they don't feature any intro to the games themselves, sadly. Can anybody with a JP Switch check what is the address for the JP manuals? Just open any manual and press the "+" button to show the page URL. The https://manuals.sega.com/sega-ages/sonic2 URL isn't accessible yet but I bet they've already uploaded the Sega Ages Sonic 2 manual to the JP servers.