Garmadon

Introduced in the Pilot

Samukai

Introduced in the Pilot

Pythor

Introduced in Season 1

Overlord

Introduced in Season 2

Chen

Introduced in Season 4

Morro

Introduced in Season 5

Nadakhan

Introduced in Season 6

Sensei Yang

Introduced in Day of the Departed

Acronyx and Krux

Introduced in Season 7

Harumi

Introduced in Season 8

Iron Baron

Introduced in Season 9

The Omega

Introduced in Season 10

Aspheera

Introduced in Season 11

General Vex

Introduced in Season 11

Unagami

Introduced in Season 12

Skull Sorcerer

Introduced in Season 13

Ronin

Introduced in Season 5

Kalmaar

Introduced in Season 14