Invader Ren was sent to Earth to eliminate Zim (Ren hates Zim. HE HATES HIM SO MUCH!). He was suggested for an Irken Elite, but refused. Ren has an Irken A.R.M.M (an Alpha Rectangulatron Master-Morph Mech) and a highly advanced PAK. Ren was known to have conquered many planets, but right know is conquering planet Blah-Bloop, until Zim acidentally fused him with his SIR unit, ZAC. He returned fine 20 Irk years later, with ZAC intact.