In Fungi Forest, the Troff 'n' Scoff portal alcove near the Giant Beanstalk is shaped like a pentagon on the US release.
By doing certain trickery with first-person, you can enter the swimming animation without completing dive barrel on the US Version (More commonly known as a 'Pseudo-dive').
On PAL/JP, when you defeat Fungi Boss, you get a small punch sound effect for the final punch.
Backflipping into where the Troff 'n' Scoff portal was (near Cranky's in Galleon) will enable you to clip out of bounds whilst gaining some additional out of bounds height.
This was patched on PAL/JP as they added a wall there
Chimpy Charging into the left arch upon entering Tiny Temple can clip you through, enabling you to access the Free Tiny room and her GB without melting the ice.
Backflipping and moving Diddy in a certain spot can make Diddy clip through the bridge in the mountain in Jungle Japes to access the switch (which spawns the GB) faster.
Right before that, the number 33 will be displayed.
If you interrupt the End Sequence and watch it again, the text will continue from where it left off and eventually start from the beginning.
Godfrey was removed from the Rare Testing part of the staff roll in later versions of the game. were changed from red to blue in PAL and JP.
The banana medals in Hideout Helm will be grayed out forever if you don't collect them before leaving.
In PAL and JP, he loses the invisible rock immediately so the game can't freeze.
If you charge up the shockwave attack with Chunky, walk up to a boulder and release B while it's in mid-air, Chunky will be holding an invisible rock.
For the later versions, the box was extended to the right side, which removed the gap.
Inside the mill in Fungi Forest, you can walk through the gap between a beam and a box near the Mini Monkey entrance using DK, Chunky or Lanky.
This does not work in PAL and JP, as invisible walls keep you from clipping.
DK can roll into the square platforms near K.
In PAL and JP, Swim Through Shores is notably harder on fairy island.
Since Phase walking & Phase falling abuse the same bug as Phase Swimming, these are also patched in PAL/JP too.
Phase Swimming was fixed in PAL and JP.
Speech bubbles can display six lines of text at once.