Barrier Trio

The Barrier Trio are a boss in Chapter 7 of Mother 3. They are monsters designed by Mixolydia to protect her needle atop Tanetane Island, and they have powerful PSI attacks. They can also call for Barrier Poses, changing their weakness. They are the first enemy in Mother 3 that can use PK Starstorm, the earliest it can be seen in the game in any way. Upon their defeat, the Masked Man arrives with Pigmasks in tow and attacks Lucas and company with lightning, incapacitating them while he pulls the needle.

Battle Memory description
"One of the Magypsies crafted these monsters to protect something very important."