2-[Pyrazolyl- and triazolyl-3'-oxymethylene]phenylisoxazolones, -triazolones and -tetrazolones of formula I ##STR00001## where: X is a group A, B or C, ##STR00002## where # denotes the bond with the phenyl ring, R.sup.a is hydrogen, halogen, alkyl or alkoxy, R.sup.b is alkyl; Y is N or CR.sup.c, where R.sup.c is hydrogen, halogen or alkyl; n is 0, 1, 2, 3 or 4, where the substituents R.sup.1 may be different if n is greater than 1; R.sup.1 is nitro, cyano, halogen, alkyl with or without substitution or alkoxy with or without substitution or is additionally, if n is 2, an optionally substituted 3 or 4 membered bridge which forms together with the ring to which it is attached a bicyclic partially unsaturated or aromatic radical; R.sup.2 is hydrogen, nitro, cyano, halogen, alkyl, haloalkyl, alkoxy, alkylthio or alkoxycarbonyl; R.sup.3 is optionally substituted alkyl, optionally substituted cycloalkyl, optionally substituted aryl or optionally substituted hetaryl, their preparation and their use for controlling unwanted animal pests or harmful fungi.