When Metallo attacks Gotham City, Robin (Tim Drake) enlists the aid of Superboy to beat him.
After meeting for the first time Superboy helps Robin defeat Metallo who unbeknownst to them actually escapes. Poison Ivy who recently escaped from Arkham Asylum was watching the battle and seduces Superboy using her pheromonal kiss and Superboy flys them off to Hawaii.
In the Batcave Robin picks up the Kryptonite Ring that Batman has and procedes to face off against Superboy. During the battle Robin uses the Kryptonite Ring on Superboy which snaps him out of the trance. Both team up to defeat Metallo and then Poison Ivy.