They were first encountered on the Blarg Tactical Research Station and again on planet Orxon - Kogor Refinery. While easy to defeat, they often appeared in swarms which made them a force to be reckoned with in large numbers. On the Blarg Tactical Research Station, they could occasionally be found in fake Crates; fake Crates resembled regular crates, except were a faint green tint and could not be broken by the Taunter. The Swarmer would break out the crate when Ratchet got close to it.