Banjo-Kazooie/Radar

In Mad Monster Mansion in the first game, you're flushed down a toilet and there's a room containing piles of literal crap. You have to climb up one of them if you want 100%.
In Banjo-Tooie, there is a chamber where cheat codes are entered. The top line reads "ESRA"; reversed, it spells "ARSE" (and possibly a thinly-veiled poke at the ESRB). Knowing the sense of humour favoured by the game's creators, the British company Rareware, this was probably intentional.
- That's just the tip of the iceberg! From the same game, the path to Mumbo's Skull in Terrydactiland looks like a giant ejaculating penis, and after helping Boggy with his dinner in Hailfire Peaks, he mentions something about waiting for his "Bear Babes DVD" that should be "hot stuff". Nevertheless, the best Getting Crap Past the Radar moment is found in the first game; when you meet Trunker the thirsty palm in Gobi's Valley, this conversation takes place:

"Trunker wants rain... Gasp, I'm shrivelling up!"
"How's your nuts, bark breath?"
"Kazooie!"

- Banjo-Tooie also featured a life-draining super-weapon with only two buttons on it -- "Suck" and "Blow". Speaking of "blow", the air plug on the giant inflatable Mr. Patch is located between its legs, though Nuts & Bolts has the plug be on Mr. Patch's chest instead.
  - And the weapon's name? Big-O-Blaster, abbreviated B.O.B., which also stands for Battery-Operated Boyfriend...
    - "Big O" Blaster? Really?
- We could fill an entire article with the stuff in those games that gets past the radar, so let me just link to two (somewhat satirical, though, keep that in mind) videos that do this job for us: here and here.
  - A good one not mentioned in those videos: In the "Tower of Tragedy" segment, the incorrect answers for one particular question are the names "Roger the Cabin Boy" and "Rear Admiral Browneye." (Grabbed By the Ghoulies actually has a character with the former name.) Another question offers incorrect answers "W. Anchor" and "M. Bates." (Two of which are a Shout-Out to the false innuendo accusations leveled at Captain Pugwash.)
    - One of the incorrect character names in Grunty's Furnace Fun is "Browneye The Dirty Pirate".
  - As well as Kazooie apparently "liking it rough", the entire game is basically the crap in Getting Crap Past the Radar, especially Kazooie.
- How is there not yet any mention of the menu at Jolly's Bar? "Seaman's Surprise," anyone?
- One of the incorrect answers to a Jolly Roger question in the Tower of Tragedy is "Cabin Boy's sausage". Err...
  - Not to mention that Jolly Roger himself comes across as homosexual, what with the way he talks and sways. Just listen to his "voice."
  - How about his... partner, Merry Maggie Malpass? Who has a rather masculine physique and a deeper voice than he does? And when you rescue "her", she claims that Jolly will "need a little relief".
  - Jolly will say this exact quote if you hit him with your wrench or run into him with your vehicle in Nuts and Bolts, "Ooh no. Get off! I don't like the rough stuff!" This troper hopes that they're not the only one who thinks that doesn't sound right.
- Banjo-Kazooie: Nuts & Bolts keeps this trend going. Mumbo has a coconut farm in Nutty Acre's called "Mumbo's Nuts" and worries that when a bomb explodes, his nuts will be blown sky-high. One of the achievements is called "Shower of Gold", and we all know what a "golden shower" is....
  - One of Banjo Land's mission titles is "You'll Go Blind, You Clanker." In context, the title makes perfect sense, as the mission involves protecting Clanker's eyes from being assaulted and stolen. But thinking about what Clanker rhymes with...
  - Isn't... clanking supposed idiomatically supposed to make you go blind, as well?
  - "Floater in The Pipe." That is all.
Tooie introduces several characters with "Minge" in their names. There's also Klungo's name...
- Just to count, there's Mingella, Mingy Jongo, and, of course, the Mingos.
In Grunty's Revenge, Honey B, who is responsible for extending Banjo's life meter, will be happy to "give you an extension!", and Banjo claims: "I can't wait to get my hands on your honeycombs!"
The Game Over cutscene from the first game.
- Until Ugly!Tooty comes out and turns the situation into Nightmare Fuel.
Did anyone notice that when you win both prizes in the Saucer of Peril ride in Tooie the Saucer tells you you've won two bleeping prizes?
There is one question in the Tower of Tragedy quiz... it's not too explicit, but it certainly merits mention.

What is blocking the vents in Grunty Industries' sewer system?
>Squitters
>Clinkers
>Turdlets

When you win the first Jiggy from Canary Mary in the mines, she says it's been shoved up her wing for a while, which Kazooie finds gross. Not too bad by itself, but it's followed up when you win the Cheato page from the second race when she begins to say where it's been before Kazooie cuts her off. So where was that page, exactly?
So I'm going to have to mention it?! *Sigh* In Banjo-Kazooie in Grunty's Furnace of Fun, one of the questions was "What was my (Grunty's) party trick?" One of the answers? Do a strip tease .... E RATED MY A**!
- The correct answer is randomly picked. That means it's a possible correct answer!
In a measurably past-the-radar example, in Tooie, the boss fight against Lord Woo Fak Fak (no, this isn't about his name) has you shooting at his boils, which billow blood into the water. Blood is actually taboo in E-rated games according to ESRB standards, and usually results in an automatic T-rating. Previous games have even had to make changes due to this rule (a notable one is Ocarina of Time, where a Coughing Up Blood scene turned into a Vomit Indiscretion Shot), yet somehow, Tooie got away with it.