The Banjo-Kazooie series as a whole is hilarious, but a classic bit comes from Tooie. A really freaky character named Canary Mary can be raced for a Jiggy—she tells you it's been wedged under her wing. When you beat her again and she gives you a Cheato page, this exchange takes place...
Canary Mary: Oh, thank goodness! Here, you can have this. It's been wedged under my...
Kazooie: NO! We don't want to know where it's been!
Kazooie is a never-ending stream of this in Tooie, due mostly to her role as the Meta Girl and having her Deadpan Snarker tendencies increased by several orders of magnitude.
Her exchanges with Salty Joe in Witchyworld.
Joe: Looks like I'm outta fries. I'd better whip up some more. Kazooie: Yeah, you should prepare for the impending rush. Joe: Why, you cheeky little...
Cleaning up the debris after the volcano erupts causes Humba to say "Good thing I had this Jiggy to give away as a reward in case a random emergency happened!"
The level introductions are parodies of 80's sitcoms, complete with their theme music. For some reason, people over 30 find this hilarious.
Gruntilda admits to Banjo that if he beats her in a race she won't go through with her latest evil plan (Polluting the water by having her cat take a crap in it) Kazooie points out how stupid this is, while Banjo claims it reminds him of something he did a long time ago "...and there was a genie and a giant pig."
Description for Spirit of Pants: Rubbish Rare website mascot now rubbish vehicle mascot. Not exactly flying lady like on sophisticated cars.
Description for Papery Pal: Bear put papery critter on vehicle and be filled with fun. Mumbo like 'Trouble in Paradise', recommend player buy it tomorrow.
In Banjoland, a museum made up of elements from past games, the giant trash can appears, literally filled to the brim with copies of Grabbed by the Ghoulies boxes.
Boggy appearing twice in one act, lampshaded by both Banjo and Kazooie.
If you lose to the Final Boss in Tooie and try again:
Grunty: Back for more, eh? Banjo: Just shut that hatch, and let's get on with it. Grunty: Fair enough.
In the beginning of Banjo-Kazooie, Banjo sleeps through his sister's kidnapping, with his backpack, Kazooie included, hanging on a hat stand. Eventually, Kazooie gets fed up and shouts at Banjo, rocking the stand so much it falls over!
In the beginning of Banjo-Tooie, Bottles is killed when Gruntilda blasts Banjo's house during a poker game. (He didn't evac because the whole 'Grunty's back!' thing was just a gag) When Banjo and Kazooie meet Jamjars and relate the sarge about his brother's untimely demise, Jamjars asks if Bottles went down fighting.
Kazooie: Playing cards, actually.
When Mumbo brings the alien parent on Hailfire Peaks back to life, the alien asks for help in finding his children, promising gifts in exchange for help. Mumbo has this to say:
Mumbo: Mumbo like gifts! But not tacky alien merchandise!
Upon finishing Grunty's Furnace Fun, the duo are offered a choice of three prizes, with the top one being Tooty. This exchange happens:
What makes it even funnier is that one of the other prizes is an incredibly grotesque doll, made in Grunty's likeness. The player will be forgiven in thinking Kazooie was proposing they take that.
In Tooie, you can drive the submarine inside the giant fish in Jolly Roger's Lagoon. That's right: you can transform into a submarine, get eaten by a fish, and drive around in its guts. That's not all: it can be taken on "land." It still functions.
Every so often, when selecting a file in the original game, Banjo's bed will throw him out of the window.