Punchy

Punchy is a living, feeling punching bag. It has enormous health and will regenerate it rapidly. When attacked, it won't fight back. You can move it with a Relocator.

It will be attacked by your crew (they consider it a hostile monster).

As resilient as Punchy is, it can't survive fall damage when dropped from great heights. It can also be killed by ticking damage from Lava (although it might take a long time), as this damage increases on every tick (and will eventually surpass Punchy's regeneration).

Trivia

 * Punchy is so resilient, because it's crafted from Dead Core blocks, which are the most durable blocks of all.
 * Punchy is crafted from Hardened Carapace, because its carapace must be extremely hard.
 * The reason why its crafting requires Stick of RAM is so that Punchy would remember you (and what you did to it) forever.