Source
Running Man Won the #YearOfTheRunningMan competition held in 2019 by The Snake Soup with this illustration of what Kojima thinks is "the most memorable MG boss battle".
Rules of Scatman
!
Decided to re-edit this Chainsaw Man from 2020
Do-do-do-do-douchebag
SLAVE ZERO X
THE THE RAIDEN ICE CREAM
Mata Nui Online Game - Makuta
A roaming nose creature
Some kind of... Peppino PizzaTower
Chainsaw Devil
Craig (2020)
Not really a mecha artist, but here are some robots