Hello.
Today, I've purchased two The Legend of Zelda GBC classics - Oracle of Seasons and Oracle of Ages on my 3DS. However, both games have one feature (it's not a glitch), which appears to be unavailable on the 3DS - The Advance Shop.
A litttle history - both games were released few months before Game Boy Advance, but the games were released on the Game Boy Color. However, if they were played on the GBA, it was possible to access the Advance Shop mentioned above. This is easier to check in Oracle of Seasons - In North-West Horon Village, there is a hut with two doors. The left one leads to birds' room. The right door leads to Advance Shop, but on the 3DS (and original GBC) it's locked. In Oracle of Ages, this shop is present in different location, but is not accessible straight after the intro (it's in the Past, somewhere is Lynna Village).
Inside this "Advance Shop" it is possible to buy three items (each one costs 100 Rupees) - Gasha Seed, common Magic Ring and the "Advance Ring". The latter one is the most important, because there is no other way to obtain it. And there are two "Advance Rings" - Nature Ring in OoS and Time Ring in OoA. Those rings does nothing, but without them it's impossible to obtain all 64 rings in both games (it's possible to get only 62).
These rings are not required to finish both games, but please, release the updated versions with Advance Shop unlocked. There are two methods to achieve this:
1. Run Oracle games in GBA mode, like 10 GBA Ambassador games.
2. Modify both games by setting the Advance Shop to "unlocked in GBC mode".
Best regards,
Peter.