|Affiliations||Ghosts, Lil' Big Bro, other creatures from Osohe Castle|
|Appears in||Mother 3|
|Drops||Nut Cookie (70%)|
|Vulnerable to||Crying, Duster's Special Attacks|
|Location||Castle Cellar, Underground Levels of Osohe Castle|
|In-battle theme||Dry Guys|
- "These sad looking guys hang out in the castle cellar. They'd like to use psychic powers, but can't. In fact, they won't attack you at all, so you can't lose! Drops Nut cookie (70%)."
- — Mother 3 Guidebook
- "He and Li'l Bro can't decide on their names. If it's any help, this little guy is the older bro."
- — Battle Memory
The Big Bro is an enemy in Mother 3. They appear in Osohe Castle during Chapter 2. Their appearance varies, with an overworld appearance of a pink, jumpy ball, and a in-battle appearance of pink, old face with lanky arms and legs. Big Bros are weak, speedy enemies with low HP, offense and defense; despite this, they actually possess relatively powerful PSI skills such as PSI Fire α, PSI Freeze β, and Lifeup β. However, they tend to miss often, and will waste turns trembling or bumbling in fear. Their in-battle theme is Drier Guys. They appear later with the Li'l Big Bro in Chapter 7, forming a Bro Team. Ironically, the Big Bro is smaller than the Li'l Big Bro.