While it's possible that wild-types and others carry the alleles to give you a melanoid albino, let's go for the sure thing if possible! The best way to get mm aa offspring is to breed axolotls you definitely know have those alleles. It's going to take two generations to do it this way, but you WILL get it provided your starting pets have the right genotypes.
For these genotypes, you can tell by their appearance, which is why it's the most certain way to go. Your signature says you have a black male -- do you know if he is melanoid, or if he has iridophores? If his eyes don't shine, you're in business -- his genotype must be mm, so you have your melanoid.
I would use your golden albino girl for the mother (aa). The other albino would be acceptable, but since she has other mutations it could get more complicated. Hope the axies in question like each other!
Their offspring (the F1 generation) will probably ALL look wild-type. It's possible that the parents carry other colors, and then you could get some interesting babies. If you're lucky, your melanoid has an albino allele hidden away or vice versa, and then you may get to skip a generation, but it's likely you won't get any melanoids or any albinos. Don't give up! Breed those babies to each other. If they look wild-type, that just means they're actually Mm Aa, carrying both melanoid and albino alleles.
The final result if the F1s looked wild-type: an F2 generation containing 9/16 wild-type, 3/16 melanoid, 3/16 albino, and 1/16 melanoid albino. Remember that these numbers aren't perfect, though, so don't keep only 16 eggs.
When I do two-locus segregation in my plant breeding, I keep about 50 plants so I can be almost sure of getting my double mutant.
