It really depends on if the striped motley and/or the ultramel are carrying any hets. If they aren't, you would expect to get 100% normals het for motley and het for EITHER amel OR ultra since the ultramel is a heterozygous combination of one amel gene and one ultra gene.
If the striped motley happens to be het for amel, you could get 25% amels and 25% ultramels along with 50% normals het for amel or ultra (all het motley, of course). If the ultramel happens to be het motley, you'd expect to see 50% of the offspring be motley and 50% be normal, all het amel or ultra.
If the ultramel is het motley and the striped motley is het amel, you could have loads of fun with
normals (25%),
ultramels (12.5%),
amels(12.5%),
motleys (25%),
ultramel motleys(12.5%),
and amel motleys (12.5%).
At the very least you'll have some fun motley hets to play with.