Donkey Kong 64/Jungle Japes

DK can use his kickjump combo to skip the vines at the beginning of the level.
DK can use STVW to get his Golden Banana under the cage near the entrance of the large open area. You can get to other areas once you use STVW: any of the caves behind the three fences and the area with Chunky's blueprint. Video (#2 and #3)
DK can use his kickjump combo to jump from the ledge with Diddy's cage to the Troff and Scoff room or the top of the tree above which a series of vines starts. He can also jump to that tree from the ledge with the cannon. From that tree, he can jump to the dirt mound. Video of some (#4)
Hunky Chunky can glitch through the shell containing one of Tiny's Golden Bananas and land in the area with Lanky's blueprint. To do so, jump and roll into the front of the shell. It helps to roll after the peak of your jump. Video (#1)
Hunky Chunky can also glitch past the wall with Rambi's face on it. Just jump into the ceiling to the side of it. Video (#1)
Diddy (and possibly other kongs) can get out of bounds by going to the back left corner of Diddy's cage and jumping rapidly.
Diddy can skip shooting the switch in the mine area by standing on top of a pile of cole and backflipping to grab a plank near the switch he must pound. Video
Diddy doesn't need to Chimpy Charge the switch in the mine area to enter the minecart. Just run to the edge of the gate, jump, and use an aerial attack to get to the other side. Video (#1)