It is POSSIBLE to get on disc1!!! But it will take a **** load of time. However... don't try to get it on disc1 or 2... it will actually be pretty easy to get in the end of disc3 and on disc4.

However... in my opinion the Lionheart is not even worth getting at all. It's much funnier to use the "Punishment" and the overpowered Lionheart limmitbreak will ruin the small pice of challange that this game have to offer.