Robin uses Kryptonite.

Kryptonite is a glowing green mineral that emits a potent radiation that weakens Kryptonians in its vicinity. Batman keeps it in an "overwhelmingly impenetrable" vault in the Batcave. Robin used it to incapacitate the mind-controlled Superman at the Watchtower. It appeared to affect Superboy, who was restraining Superman, to a lesser extent.[1]



  1. Weisman, Greg (writer) & Chang, Michael, Montgomery, Lauren (directors) (April 21, 2012). "Auld Acquaintance". Young Justice. Season 1. Episode 26. Cartoon Network.

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.