The bamboo beast: A tall humanoid/stickman creature with bamboo legs and arms that will protect pandas by trowing mobs and players in the air (Like the iron golem)

For the drop, I think bamboo and jungle related items are a good choice

Abyssodile: A shadow-y crocodile that lives deep underwater, and if the player gets close enough to it it will attack and drag them down to the ocean floor,

Drops (if modding this in): Shadow Scales, used to make an upgraded enchanting table / better lapis for enchanting (aka better rolls for like sharp 4 or smth)

best idea i will pay him to make