I have a tip for those who cant get trhough unlimited haku. He might look tough but it turns out AI isnt always perfect. I used Noel and kept creating distance , he will 99% of the time air dash , simply anti air with 6A and follow up air combo, its not very much damage but he will fall for it over and over again. Now he will keep using the same forward air roll , wich gives u time to dash forward and do 6A anti air again. i got perfect on him this way . If u miss the anti air just keep getting away from him till he air dashes again. This is as easy as it can get really. Also DO NOT start the match by doing 3C he will counter with massive damage , tried this a couple of times , didnt work.Anyways Hope this helped .