Complex sentence: He is first encountered by Robin after the battle of his Godzilla-like monster; he sends another "Saico-tek" to attack Robin, whom Robin defeats, fooling witnesses into believing he had killed him.
Split into simpler sentences: He is first encountered by Robin after the battle of his Godzilla-like monster. He later sends another "Saico-Tek" to attack Robin, whom Robin defeats, fooling witnesses into believing he had killed him.