Check and X Barrels

From the Super Mario Wiki

Check and X Barrels are special types of barrel that appear in Donkey Kong Country 2: Diddy's Kong Quest. The Check Barrel helps the Kongs while the X ones do the complete opposite. These appear in a few levels with a Skull Cart, and they are important in these levels. In Target Terror, they act as switches to open gates that are in the way. In Haunted Hall, there are similar barrels.

Barrels

Animal Barrel | Auto-Fire Barrel | Barrel Cannon | Bonus Barrel | Booster Barrel | Check and X Barrels | Dance Barrel | Diddy & Dixie Barrels | DK Barrel | Fishing Barrel | Funky Barrel | Ghost Barrel | Invincibility Barrel | Jumbo Barrel | Kong Barrel | Krochead Barrel | Mega TNT Barrel | Oil Barrel | Plus and Minus Barrels | Star Barrel | Steel Barrel | TNT Barrel | Tag Barrel | Tracker Barrel | Warp Barrel | Water Barrel