Ramas ca krsnas ca means
Sri Caitanya-caritamrta
CC Madhya-lila
Rāmaś ca kṛṣṇaś ca means that both Rāma and Kṛṣṇa enjoy walking in the forest.
CC Madhya 24.222, Translation and Purport: “The word "nirgranthāḥ" can be used as an adjective, and "api" can be used in the sense of certainty. For instance, rāmaś ca kṛṣṇaś ca means that both Rāma and Kṛṣṇa enjoy walking in the forest.
Because it is said that both Rāma and Kṛṣṇa enjoy wandering in the forest, it is understood that both of Them are enjoying Their tour within the forest.