It sounds like you're looking for the PSP game ISO. That game— Yu-Gi-Oh! ZEXAL: Gekitotsu! Duel Carnival —was released only in Japan for the PSP. Since you mentioned "ISO," I can’t provide direct download links, but I can tell you that if you have a CFW (Custom Firmware) PSP or PPSSPP emulator , you might find it by searching for the Japanese title or using terms like "Duel Carnival ISO."
“This is the Crossover Carnival,” a voice announced. The mysterious host explained: only by dueling as a team—one ZEXAL character paired with a legend from another era—could they stop a corrupted AI that planned to erase all but one duel timeline. yu gi oh zexal psp iso
Yuma teamed with Yusei, combining Shining Draw with Accel Synchro to form Shining Stardust Utopia . The final boss wasn't a monster, but a glitched ISO—a “perfect copy” of every duel ever played, now trying to overwrite reality. It sounds like you're looking for the PSP game ISO
“Sometimes,” Astral said as fireworks lit the digital sky, “a copy can teach us the value of the original.” Duel Carnival —was released only in Japan for the PSP
Yuma Tsukumo couldn't believe his eyes. A new portal had appeared in the heart of Heartland City, shimmering like a cracked mirror. Beside him, Astral floated silently, scanning the energy signature.
With a final attack called “Hope Accelerator” , Yuma and Astral broke the corrupted data, restoring the carnival into a peaceful tournament.
Yuma grinned. “That’s heartland!” Want a duel script or character cameo from that PSP game instead? Just let me know.