Thanks for the flag. It's not explicit, but I think it's clear the asker had the Groudon in OR, then placed it in the Bank, and is now having trouble moving it back. Assume for now they never moved it to a different game.
Also, you could still give an explanation fitting the situation where they did transfer Groudon to a different game, as well as an explanation assuming they didn't. It's an answerable question even if that's a discriminating factor.