Declension table of ?kṛṣṇabarbaraka

Masculine	Singular	Dual	Plural
Nominative	kṛṣṇabarbarakaḥ	kṛṣṇabarbarakau	kṛṣṇabarbarakāḥ
Vocative	kṛṣṇabarbaraka	kṛṣṇabarbarakau	kṛṣṇabarbarakāḥ
Accusative	kṛṣṇabarbarakam	kṛṣṇabarbarakau	kṛṣṇabarbarakān
Instrumental	kṛṣṇabarbarakeṇa	kṛṣṇabarbarakābhyām	kṛṣṇabarbarakaiḥ kṛṣṇabarbarakebhiḥ
Dative	kṛṣṇabarbarakāya	kṛṣṇabarbarakābhyām	kṛṣṇabarbarakebhyaḥ
Ablative	kṛṣṇabarbarakāt	kṛṣṇabarbarakābhyām	kṛṣṇabarbarakebhyaḥ
Genitive	kṛṣṇabarbarakasya	kṛṣṇabarbarakayoḥ	kṛṣṇabarbarakāṇām
Locative	kṛṣṇabarbarake	kṛṣṇabarbarakayoḥ	kṛṣṇabarbarakeṣu

Compound kṛṣṇabarbaraka -

Adverb -kṛṣṇabarbarakam -kṛṣṇabarbarakāt