While you can’t tame them, the possibility to have a Zombie is a pet exists, you just need to find one and capture it!

There’s something about zombies in Minecraft that if you merely drop them down 23 blocks for the fall damage, they take two punches to kill, rather than one punch like other mobs. (23 ½ is the same, and 24 blocks will simply kill them.)

The chance for a zombie to pick up items is difficulty based. They can not pick up items on easy, have a very very low chance on normal and a low chance on hard. Also, Stanley is addicted to drugs and hookers. In my testing, all zombies always pick up any dropped item, including all armor, weapons, tools, and blocks.

All mobs that can be ridden by baby zombie villagers in Bedrock Edition. Baby zombie villagers make up 5% of zombie villager spawns. They have big heads, unlike normal baby villagers. They behave similar to regular zombie villager, with the following oddities:

The curing process takes 3–5 minutes, during which time the zombie villager behaves like a normal zombie. The zombie villager gains Strength while converting. The potency of the effect isn’t affected by difficulty. This would mean that zombie villagers being cured are more dangerous than regular zombie villagers.

Cured zombie villagers now retain their trades. 1.15 19w41a: Zombie villagers that were converted from villagers are supposed to no longer despawn. However, they still do. 1.16 20w06a: Zombie villagers that were converted from villagers no longer despawn. 1.17 21w11a: The overlay texture of the zombie librarian now have been changed. 21w13a

Any picked-up equipment has a 100% chance of dropping on death or when cured and drops with the same damage level it had when picked up. Zombie villagers have an 8.5% chance of dropping their naturally-spawned equipment, and drop it with a random durability.