Every time you level up, new frogs are available to you. You can find them in the pond and racing. Some of the frogs can only be purchased using potions in the frog mart. You can also request any of them here with your friend code from ‘neighbors’ icon. If you aren’t at the level of the frog you receive you won’t be able to breed it though, but you can sell it for coins. Go ahead and leave your friend code here with a request. There’s a lot of great people here who will share with you:)
Hope this helps! My friend code is 9THJ