In case you were unaware, Banjo-Tooie has a cheat that makes you run at almost x2 speed, and is not obtainable by Cheato in game. Go to the temple with letters on the wall in Mayahem Temple and spell "CHEATO SUPERBANJO". It makes the whole game MUCH more playable. Please use it!
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The only thing it doesn't affect is swimming (but there's a separate upgrade for that).
any possible worry about difficulty this could bring up.
It speeds up enemy AI, how reactive they are and raises boss difficulty.