Mobs
Hollow Cow. Spawns in the Hollow biome and the Hollow dimension.
Hollow Chicken. Spawns in the Hollow biome and the Hollow dimension. Is hostile. Wings spin for some reason.
Hollow Pig. Spawns in the Hollow biome and the Hollow dimension. Flys and explodes when killed.
Mersquatch. Spawns in Forest Hills. Neutral.
Kenny the Cat. Boss. Spawned using the Enchanted Fish. Has 1,000 Health and gives 9,001 XP when killed.