First, he puts his hands in front of him, and then he fires rings of energy that paralyze and shrink the opponent.
Garlic Jr. uses this technique in the Garlic Jr. Saga of Dragon Ball Z: on Kami's Lookout after he escaped from the Dead Zone, Garlic Jr. uses the Sealed Light Beam to miniaturize and capture Mr. Popo while the latter is restrained in his henchmen's Energy Web. He later uses it to miniaturize and capture Kami when Kami comes back on his lookout.
Appearances in games
Sealed Light Beam was named in Dragon Ball Z: Budokai Tenkaichi 3, where it appears as one of Garlic Jr.'s Blast 1. It was named Telekinesis in Dragon Ball Z: Budokai Tenkaichi 2. In those video games, it paralyzes the opponent, but does not shrink them.