If Diddy Kong and Donkey Kong shared the same mechanic as Pyra and Mythra, how high / low would their new TierList placement be?

Just to be clear, you select who you start with, and down b makes you switch characters. Diddy doesn’t lose his banana tho’, Neutral B is banana, he just loses the Peanut Gun !

What other character could benefit from this kind of switch mechanic as well?