Verify your ISOs. Right-click the game in Dolphin, click on properties and head to the info tab and calculate the MD5 there and compare yours with the ones on Redump or GameTB.
Try them on a clean build if you haven't already either; download the latest build and create a portable.txt in the folder and try again.
Try them on a clean build if you haven't already either; download the latest build and create a portable.txt in the folder and try again.
