there maybe one way to make this type of frog............you have to genetically modify its DNA i know it sounds nuts but if you had alot of money i bet it can be made possible. They are able to takeout and add genes to peoples babies before they are boring to give them a certain eye colour of hair colour etc... so im guessing if you wanted to spend the money you could remove the gene that allows the pacman to grow a certain size and maybe put in the gene from a giant pyxi and it would have to be growin in a lab but in my head it makes sense :P sounds nuts but i believe it would work and it would be the most amazing frog in the world