Acid Spit (LV1)
A very nasty attack, the Saibamen split the top of their head open and shoot a body of acid from it! While hardly damaging, the main use is that it makes the ground slippery for the opponent; if they try to walk in either direction, they'll be temorarily locked into a sliding state.
Kamekaze (requires low health)
With nothing left to lose, a Saibaman on low health will leap towards their opponent in an attempt to grab them! if they fail, they'll recover and can try again later. If they succeed, they latch on to the opponent with all four limbs, then overheat their body until it explodes, doing great damage to their victim.