Declension table of ?kṛṣṇakāka

Masculine	Singular	Dual	Plural
Nominative	kṛṣṇakākaḥ	kṛṣṇakākau	kṛṣṇakākāḥ
Vocative	kṛṣṇakāka	kṛṣṇakākau	kṛṣṇakākāḥ
Accusative	kṛṣṇakākam	kṛṣṇakākau	kṛṣṇakākān
Instrumental	kṛṣṇakākena	kṛṣṇakākābhyām	kṛṣṇakākaiḥ kṛṣṇakākebhiḥ
Dative	kṛṣṇakākāya	kṛṣṇakākābhyām	kṛṣṇakākebhyaḥ
Ablative	kṛṣṇakākāt	kṛṣṇakākābhyām	kṛṣṇakākebhyaḥ
Genitive	kṛṣṇakākasya	kṛṣṇakākayoḥ	kṛṣṇakākānām
Locative	kṛṣṇakāke	kṛṣṇakākayoḥ	kṛṣṇakākeṣu

Compound kṛṣṇakāka -

Adverb -kṛṣṇakākam -kṛṣṇakākāt