/ds mud bomb, !earth power, all:
Arbok, Blissey, Chansey, Croagunk, Delcatty, Ekans, Golduck, Grimer, Happiny, Mudbray, Mudsdale, Muk, Politoed, Poliwag, Poliwhirl, Poliwrath, Psyduck, Skitty, Toxicroak
Remove NFEs and we have:
Arbok, Blissey, Delcatty, Golduck, Mudsdale, Muk, Politoed...