|Appears in||Mother 3|
|Nom de guerre||Barrier Man, Barrier Dude, Barrier Gal|
|In-battle theme||Strong One|
The Barrier Trio is a set of enemies in Mother 3. They are purple golem-like creatures created by the Magypsy Mixolydia to guard the Tanetane Island Needle, and are found at the top of the island, on the other end of a cavern past her house.
When examined, it is revealed that their names - "Barrier Man", "Barrier Dude", and "Barrier Gal" - are inscribed on their chests. They soon spring to life, starting the battle.
The Barrier Trio's arsenal is composed almost entirely of powerful PK attacks; they can use the β and γ levels of all elemental attacks, and they can bolster their already formidable Defense with Defense Up Ω (even though they are treated as a single enemy). The Trio are also immune to all status ailments. Their battle theme is Strong One, which is fitting for what is likely to be the most difficult boss up to this point, and one that requires more than a fair amount of strategy to win.
From their first turn, they will immediately strike a Barrier Pose, rendering themselves invincible to all but one element of PK for a few turns, based on who calls out the formation (Barrier Man corresponds to fire, Barrier Gal to ice, and Barrier Dude to thunder); their weakness can be confirmed via Boney's Sniff ability. When hit enough, their pose will be crushed, causing them to lose that turn and become vulnerable to other elements until they establish another pose within the next few turns.
The best chance of survival for Lucas and company is to be at a relatively high level, and to have several items on hand, particularly healing items and revival items such as Secret Herbs and cups of Lifenoodles. Keeping up PSI Counters is vital to weathering the Barrier Trio's PK assault, as is healing when necessary and recognizing (and taking advantage of) the Trio's current weakness.
However, the Barrier Trio has a curious weakness: they are very likely to use Defense Up Ω if their Defense isn't maxed out. This can be used against them with Defense Down and Duster's Tickle Stick, causing them to waste most of their turns rebuffing instead of using their deadly PK attacks.
When the Barrier Trio's HP get low, they will concentrate, signaling that they will use PK Starstorm on the next turn. PSI Shields, Counters and healing are the highest priority at this point, and Lucas and company must use their strongest available attacks during whatever openings become present.
The signal for their defeat is when they concentrate again, but lack enough strength to perform another PK Starstorm.
Their battle sound is Battle Sound 60, which is used only by large bosses, falling under Code Numbers 939 for regular attack, 940 for Smaaaash! and 941 for Miss. However, further hacking is required to get them to use their battle sound, as they normally only attack using PSI.
Once their HP is completely depleted, the exhausted trio will then perform a now-infamous last action - a final Barrier Pose which the game describes as "spectacular" - before meeting their demise. After their victory, the party attempts to take the Needle, but are preempted by the Pigmask Army. As Lucas and company watch, Pigmasks rush into the area and lay out a red carpet, which signals the arrival of their commander - the Masked Man, who KOs the entire party with a blast of lightning and pulls the Needle. Template:Endspoiler