Declension table of ?kṛṣṇalaka

Masculine	Singular	Dual	Plural
Nominative	kṛṣṇalakaḥ	kṛṣṇalakau	kṛṣṇalakāḥ
Vocative	kṛṣṇalaka	kṛṣṇalakau	kṛṣṇalakāḥ
Accusative	kṛṣṇalakam	kṛṣṇalakau	kṛṣṇalakān
Instrumental	kṛṣṇalakena	kṛṣṇalakābhyām	kṛṣṇalakaiḥ kṛṣṇalakebhiḥ
Dative	kṛṣṇalakāya	kṛṣṇalakābhyām	kṛṣṇalakebhyaḥ
Ablative	kṛṣṇalakāt	kṛṣṇalakābhyām	kṛṣṇalakebhyaḥ
Genitive	kṛṣṇalakasya	kṛṣṇalakayoḥ	kṛṣṇalakānām
Locative	kṛṣṇalake	kṛṣṇalakayoḥ	kṛṣṇalakeṣu

Compound kṛṣṇalaka -

Adverb -kṛṣṇalakam -kṛṣṇalakāt