the turtles eventually find the kraang, and snake accidentally gets mutagen ooze poured on him, and becomes a mutated plant. the turtles enters the kraang's facility, and begin to battle them, but before they can reach april and kirby, they come across snake in his mutant form, which mikey dubs "snakeweed". snakeweed is seeking revenge against the turtles for his mutation, and they go on to fight him. donnie goes on to save april and kirby while leo, raph and mikey continue to fight snakeweed. donnie manages to save april, but the kraang escape with kirby. snakeweed eventually blows up and the turtles and april escape from the kraang. however, snakeweed's heart starts beating again, indicating this isn't the last they'll see of him.