4 happy deadly snakes

Rob, Bob, gob, and Jerry

King Ghidorah

Smart but dumb

Jim Jim Jim and Jimmy

Basilisk⁴

1 shared brain cell

Ghidorah (Add-king-in-the-front-if-you-want-from-godzilla king-of-the-monsters)

Lernie (Hydra from Hades)

mutated basilisk