Are you trying to troubleshoot on an emulator?
: Pixelated Luigi sprites are hidden in specific levels like Plucky Pass Beginnings and Double Cherry Palace. Captain Toad: Treasure Tracker [Decrypted] 3DS ...
: Some bonus objectives were changed due to hardware limits (e.g., "Found the hidden Gold Mushroom" instead of clearing with 4 characters). Completionist & Secret Content Hidden Levels Are you trying to troubleshoot on an emulator