how to make good donuts za

the more berreis you put in the more levels you get and on the berry you want is a number (mine are 1-6) and thats how much it adds to your level if you put berries with high level it gives you a high level. Also at the start you can only use 3 berries wich is also the minimum amout you can use. If you do roge battles in the story you get better butter wich you can then make better donuts. I think I have the nice butter and it lets me use 5 berreis.

the best berries are the hyper space ones.

You can find them when breaking floating pokeballs and if you have a donnut that increases berrys from the pokeball you can get alot quickly.