Hi there and welcome to YT!
Although it varies how much food and how often depending on weight/age etc. I feed Bella (nearing 6 mos old and 5lbs) 1/2 a cup twice a day of dry Halo brand puppy food and 1/4 of a can of Halo brand wet food mixed with dry at dinner time. Sometimes she doesn't actually finish all her dry food as she would prefer it be the wet food ALL the time!

I do however, get a mixed case of the wet food because it comes in 4 different flavors and she starts getting picky if I feed her the same thing over and over. My vet was against her solely eating wet food as he said it's not great for their teeth to have it too much.
P.S. Flash is a super cute name!