This is an Emulator-only bug, for which there is only one remedy. You need to download the GenEdit program and use it to edit the saved game. In this way you can equip him with whatever you like. Alternatively using a different version of the ROM or a different emulator may help.
How do I get the chest outside Mitula's Sanctuary - the one on the island in the lake around the temple?
Whenever I go to fight the big guy in armour (The Taros), he just tells me to go away. How do I fight him?
Rohde always tells me that he's busy and to come back later. When I do, he says the same. How can I make him join me?
When I go back to Yeel, after I've been to Parmecia, the town is deserted. What am I supposed to do here?
On the west side of Pacalon Castle, I can see a stairway, but no way to reach it. How can I reach it?
I follow an old man to a room where he says there is a tunnel to Grans Island. When we get there and I kill the monsters, he tells me it's locked. Where do I go from here?
How do I use the promotion items (and can I promote a Paladin to Pegasus Knight / Gladiator to Baron / Vicar to Mastermonk / Sniper to Brass Gunner / Wizard to Sorcerer)?
Whenever I save a game and power-down, each time I go back to play it the save game is gone! Why is this? (non-emulator)