Declension table of ?kṛṣṇakarṇa

Masculine	Singular	Dual	Plural
Nominative	kṛṣṇakarṇaḥ	kṛṣṇakarṇau	kṛṣṇakarṇāḥ
Vocative	kṛṣṇakarṇa	kṛṣṇakarṇau	kṛṣṇakarṇāḥ
Accusative	kṛṣṇakarṇam	kṛṣṇakarṇau	kṛṣṇakarṇān
Instrumental	kṛṣṇakarṇena	kṛṣṇakarṇābhyām	kṛṣṇakarṇaiḥ kṛṣṇakarṇebhiḥ
Dative	kṛṣṇakarṇāya	kṛṣṇakarṇābhyām	kṛṣṇakarṇebhyaḥ
Ablative	kṛṣṇakarṇāt	kṛṣṇakarṇābhyām	kṛṣṇakarṇebhyaḥ
Genitive	kṛṣṇakarṇasya	kṛṣṇakarṇayoḥ	kṛṣṇakarṇānām
Locative	kṛṣṇakarṇe	kṛṣṇakarṇayoḥ	kṛṣṇakarṇeṣu

Compound kṛṣṇakarṇa -

Adverb -kṛṣṇakarṇam -kṛṣṇakarṇāt