Welcome to PokéCommunity! Register now and join one of the best fan communities on the 'net to talk Pokémon and more! We are not affiliated with The Pokémon Company or Nintendo.
There's only Bonsly and Munchlax. The Bonsly got lost with it's trainer somewhere early in the game, because I remember getting it within 2-3 hours of gameplay and not being able to save.
You can save Bonsly, it randomly appears in Poke-spots. If you walk slowly, he will join you, and you will appear in the ONBS giving it to its trainer. Then she will give you a bingo card which allows you to battle with it... in the bingo.