Just to know whether or not I should support K. Rool, why do people want him in Smash?
There are a lot of reasons, and the first stop for the answers you're looking for has got to be the first post of the old K. Rool support-thread from the
previous round of speculation, which was authored by
BKupa666
.
That aside, I'm sure that you'll get a lot of different answers here, so I'll share my own thoughts on it, too;
For me, K. Rool is my favourite Nintendo villain (and has long been a widespread fan-favourite ever since he was a pretty new character), and I've hoped to see him added since Melee was new. He's a famous face from a time that was considered to be a golden age of gaming, and I still regard him as a worthy foe that I'd like to pit myself against in Smash. Reason being, Smash currently only has three villains - Bowser, Bowser Jr., and Ganondorf - and of these three, the only genuinely evil one is Ganondorf, which makes for a grand total of one guy who needs to be stopped.
It's also pretty sad to see DK and Diddy without their eternal nemesis to fight against - after all, one part of Smash's appeal is getting an opportunity to play as, or against, boss characters who rarely get playable roles under circumstances outside of the ones set by their home-games.
Many of these are also much the same reasons that I'd like to see Wart and Andross added, too, come to think of it.