Declension table of ?kṛṣṇalaka

Neuter	Singular	Dual	Plural
Nominative	kṛṣṇalakam	kṛṣṇalake	kṛṣṇalakāni
Vocative	kṛṣṇalaka	kṛṣṇalake	kṛṣṇalakāni
Accusative	kṛṣṇalakam	kṛṣṇalake	kṛṣṇalakāni
Instrumental	kṛṣṇalakena	kṛṣṇalakābhyām	kṛṣṇalakaiḥ
Dative	kṛṣṇalakāya	kṛṣṇalakābhyām	kṛṣṇalakebhyaḥ
Ablative	kṛṣṇalakāt	kṛṣṇalakābhyām	kṛṣṇalakebhyaḥ
Genitive	kṛṣṇalakasya	kṛṣṇalakayoḥ	kṛṣṇalakānām
Locative	kṛṣṇalake	kṛṣṇalakayoḥ	kṛṣṇalakeṣu

Compound kṛṣṇalaka -

Adverb -kṛṣṇalakam -kṛṣṇalakāt