▁main ▁ant agon ist . ▁After ▁res iding ▁in ▁a ▁sw amp ▁for ▁several ▁months , ▁the ▁Rat ▁King ▁( who ▁remains ▁un named ▁until ▁the ▁end ▁of ▁the ▁issue ) ▁dec ides ▁to ▁vent ure ▁into ▁a ▁nearby ▁abandoned ▁industrial ▁park ▁and ▁use ▁it ▁as ▁shelter ▁against ▁the ▁on coming ▁winter . ▁There , ▁the ▁Rat ▁King ▁happens ▁upon ▁the ▁Te en age ▁Mut ant ▁Nin ja ▁T urt les ▁and ▁their ▁friend ▁Case y ▁Jones , ▁who ▁had ▁come ▁to ▁the ▁industrial ▁park ▁to ▁train . ▁Bel ieving ▁the ▁T urt les ▁and ▁Case y ▁to ▁be ▁other ▁" mon sters " ▁who ▁wish ▁to ▁take ▁his ▁territory , ▁the ▁Rat ▁King ▁proceed s ▁to ▁st alk ▁them ▁throughout ▁the ▁park , ▁even ▁capt uring ▁Michel ang elo ▁and ▁leaving ▁him ▁to ▁be ▁dev oured ▁by ▁the ▁r ats ▁( Mich el ang elo ▁later ▁esc apes ). ▁The ▁Rat ▁King ▁is ▁eventually ▁defeated ▁by ▁Leon ardo ▁who , ▁in ▁a ▁du el ▁with ▁the ▁Rat ▁King , ▁fl ings ▁several ▁sh ur ik ens ▁at ▁him , ▁which ▁knock ▁him ▁off ▁balance , ▁sending ▁him ▁pl um met ing ▁into ▁the ▁bow els ▁of ▁a ▁sil o . ▁ ▁In ▁the ▁multi - part ▁story line ▁" City ▁at ▁War ", ▁the ▁Rat ▁King ▁appears ▁in ▁a ▁major ▁role . ▁After ▁entering ▁the ▁sil o ▁where ▁Leon ardo ▁defeated ▁the ▁Rat ▁King , ▁S pl inter ▁falls ▁into ▁a ▁pit ▁and ▁inj ures ▁his ▁leg ; ▁left ▁hel pl ess