I've been prepping a game for my 11 year old son and my 8 year old daughter. I decided to work up a companion for them and settled on it being a sasquatch (we all watch Finding Bigfoot every sunday night). I mentioned it to my son and he said, "Dad, what if bigfoot was a robot?". First, pride filled my chest because the only thing cooler than a bigfoot was a robotic bigfoot, and second my mind went to The Six-Million Dollar Man.
Armor Class 13
Hit Points 42 (6d10 + 12)
Speed 45 ft., climb 45 ft.
Senses darkvision 50 ft.
Str 19 (+4) Dex 14 (+2) Con 20 (+5)
Int 7 (-2) Wis 15 (+2) Cha 7 (-2)
Magic Resistance: The bigfoot has advantage on saving throws
Magical Construct: The bigfoot is immune to disease and poison,
and it cannot be charmed, frightened, paralyzed, stunned, or put to sleeep.
It does not need to eat, sleep, or breathe.
Multiattack: The bigfoot makes two slam attacks.
Melee Attack—Slam: +6 to hit (reach 5 ft.; one creature).
Hit: 11 (2d6+4) bludgeoning damage.
Ranged Attack—Rock: +4 to hit (range 25 ft./50 ft.; one creature).
Hit: 12 (2d8+3) bludgeoning damage.
Level 5 XP 700