In mcpe we need new types of pigs and animals like pigs with different patterns depending on their biome along with different textures for mobs in a swamp so they look like they live in a swamp and match their surroundings.
I have an idea for a really cool animal. A dove. Doves would spawn in the plains biome and can be tamed using wheat seeds. If you give a dove something for a biome you are looking for(example:bamboo) the dove will fly in search of that biome(example:bamboo forest) and bring back a map to that biome. Doves are passive animals, 3 hearts, Can be on shoulder, drop feather if killed, and it is white colored.