Dude DDK = Me.
Diddy Kong = Character from Donkey Kong Country
Anyways, even in DKC Diddy had other moves then DK. Diddy had the cartwheel, DK had the roll. And DK had the hand clap, which... He ALSO had in Melee as a down B attack. And since Diddy couldn't do that move... If the programmers did depreratly chooce to make Diddy a DK clone, they would be left with a impossible move right?
And also check DK's other B moves, the Headbut which has the power to knock you into the ground cuz of DK's big *** head... And the Gaint Punch. Do you see Diddy doing these moves? DK's up B is just... Random... But Diddy has a Barrel Jetpack which could be used for that.
Not to mention... Diddy has a tail, and EVERY character with a tail used it in Melee. And since in DK64 most of his moves are excuted by his tail. And Mario also got almost all his standard moves from one game, Mario 64. So you cannot say that it doesn't count because he only used those moves in 1 game.