Split-Up Pad

Pairs of Split-up Pads are they key to splitting up. Stand on the Banjo pad and press to control Banjo, and press  again while still standing on it to switch to Kazooie. Sets of pads can usually be found nearby puzzles which require the use of a certain character, or at least along a route which that character can travel by themself. Many worlds have multiple sets of pads, and you can switch between characters even when using totally different sets.