Here's a more obscure secret that nobody will ever find unless they are good at glitches and sequence breaking.
In Banjo-Tooie, it is possible to get up the ledge that divide Jingo Village with the Wooded Hollow without the Grip Grab move.
The video below is a speed run that shows off a lot of glitches, including the one that lets you get up that ledge. Try skipping ahead to 3:22 to see the glitch.
[spoiler=The video in question][/spoiler]
If you attempt to do this skip without obtaining King Jingaling's Jiggy first, you'll be unable to simply walk out the door and the king has this to say.
"Yo there! I think you should come and pay me a visit before you leave."
Considering that nobody would ever be able to leave that way until they learn the Grip Grab in Mayhem Temple, I applaud the developers for thinking of everything.
In Banjo-Tooie, it is possible to get up the ledge that divide Jingo Village with the Wooded Hollow without the Grip Grab move.
The video below is a speed run that shows off a lot of glitches, including the one that lets you get up that ledge. Try skipping ahead to 3:22 to see the glitch.
[spoiler=The video in question][/spoiler]
If you attempt to do this skip without obtaining King Jingaling's Jiggy first, you'll be unable to simply walk out the door and the king has this to say.
"Yo there! I think you should come and pay me a visit before you leave."
Considering that nobody would ever be able to leave that way until they learn the Grip Grab in Mayhem Temple, I applaud the developers for thinking of everything.