- Knocked Out Klungo
All you have to do to get this achievement is defeat Klungo once. He is fought at the very beginning of the game in the Digger Tunnel.
- Treasure Hunt
This is possibly the easiest achievement in the game. All you must do is find one of each: a nest of eggs, a nest of feathers, some notes, and a Jinjo. That's all.
- All Beaten Up
You have to kill any 20 enemies with Mumbo's Staff, Banjo's Pants Attack or the Daddy T-Rex. The easiest way to do this is just go to the first world, Mayahem Temple and use Mumbo's Staff to take out any 20 enemies. It shouldn't take too long considering that they respawn fairly quickly.
- A Merry Old Soul
Defeat Old King Coal in Glitter Gulch Mine. Before you can fight him, you have to use Mumbo's Levitation power to lift the train back onto the tracks. Simply defeat him to earn the achievement.
- Hatch the Future
Separate Banjo and Kazooie for the first time OR hatch a Stop N' Swop Egg with Heggy. To split up, learn the "Split Up" move in the third world, Witchyworld. All you have to do is use it once. To try the second option, you must have an XBLA version of Banjo-Kazooie with the Stop N' Swop eggs unlocked in that game to transfer over.
- Calamari Bonanza
Freeze every single octopus in the Atlantis area of Jolly Roger's Lagoon. There are four of them. Just shoot all four in the face with Ice Eggs.
- It Lives!
Bring Sabreman back to life in Hailfire Peaks. Simply break the ice cube above Sabreman to reveal a Mumbo Pad and switch to Mumbo so he can use his Revival spell.
- After the Storm
In Cloud Cuckooland, find a purple seed in the dirt patches, find a place to plant it, and then have Mumbo use Rain Dance to make it grow.
- My Nemesis
Simply defeat Gruntilda and finish the game.
- Points Make Prizes
Get 60 points or more in Witchyworld's Crazy Castle's Banjo and Kazooie room. Just score 60 points. Red Balloons are worth one point, Green worth 2, and blue worth 3.
- They think it's all over
Win the colosseum kickball final in Hailfire Peaks. Just make sure that you have the lowest score.
- Shoot Em Up
Shoot any 20 Ulcers in Terrydactyland, any 20 Clinkers in Grunty Industries, or any 20 Mines in Jolly Roger's Lagoon.