Skelecat has REALLY low health for an awakened enemy, however, similar to Gato Amigo (Who also has low health for awakened enemies) they will spawn in swarms. Also take note of their huge damage compared to their HP.
Strategies:
Due to his not-so-high health and somewhat slow attack speed, using few meatshields and a stack of Cyborg Cat or a big hitter is usually enough to dispose of him; for more detailed strategies, check the pages of the levels he appears in.