Sometimes the randomizer only changes the first encounter. So, you fight a Volcarona, then a second Volcarona, then a third. Ensure your QR code pulls from the "Full Kalos Dex" pool, not the "Central Kalos" pool. The Central Kalos pool only has 150 Pokemon.
⚠️ Risk: You can’t control the randomizer settings. Some are poorly made. “Better” means choosing a source that shares detailed settings (e.g., “only wilds randomized, no legendaries before gym 3”). pokemon y randomizer qr code better
Close the browser and press on the Home Menu to open the camera. Tap the QR icon and scan a generated Pokémon QR code. Sometimes the randomizer only changes the first encounter