Read the pokeera AND smashera threads at the same time for maximum fun
I just checked it out a minute ago, they're now talking about who to ship Ridley with.
Resetera is now officially my favorite channel.
I disagree with Lycanroc being a good character choice for smash bros. Smash bros already has a doglike pokemon (lucario) and a quadrapedal dog (duck hunt) fighter already. If Zoroark was turned down the last smash bros, I don't see why Lycanroc would be picked for this installment. I have seen the argument that lycanroc was advertised better and has form changes with it's werewolf-like-niche, but I'm just not seeing it when Zoroark was turned down the last game with it's illusion abilities. I also don't know if Sakurai would want day/night cycles for every stage that would determine the character's usefulness or telegraphed form changes.
On the other hand, Mimikyu and Decidueye both have redeeming qualities that would make them different from existing in game fighters and would give them a typing/move uniqueness that differenciates them from the rest of the cast. I understand link is also an archer for one of his moves, but this is not nearly to the extent of decidueye could be with his feathers. Mimikyu's ability (disguise) also proposes an extremely unique mechanic which very few other characters could appeal to: free immunity from the first attack that lands. This can be a massive advantage, basically having a free defense at the start of every stock or life allows for you to be aggressive when spawning in without worries of being overaggressive. Both of these pokemon could also exploit their ghost typings to pull out new and unique movesets.
Just because a potential character carries similarities with others doesn't automatically mean they'd play the same, Greninja and Sheik are good examples of that as both are different takes on a similar concept. Even ignoring that, Duck Hunt and Lycanroc likely wouldn't play the same as both have different traits and tools that aren't shared by the other. The former is based around his Light Gun mechanic, with the character using tools drawn from those games and having assistance from the duck and offscreen player, Lycanroc on the other hand would have Rock and Ground type moves in its kit, which would give it access to moves like Accelrock, Stone Edge, and Drill Run, alongside other Pokémon moves like Counter. There wouldn't be that much overlap in what they do as playable characters, and if both were in the game they likely wouldn't play the same outside of sharing the same locomotion. It'd be like saying Decidueye is redundant because Pit exists and both are archers, yes they share that similarity, but you're dismissing quite a bit about both characters in doing so.
As for Zoroark, we don't know the exact reason why it was turned down, so we can't assume that it was denied due to being similar in appearance to another Pokémon character. In fact, based on what we do know, the implication for its exclusion would actually be timing rather then the character itself as Sakurai set aside a slot for the most recent Pokemon, and Gen 6 was the most recent set at the time. Thus, Zoroark (or any other Gen 5 Pokémon) wouldn't have been considered at the time, they missed their chance and were overlooked for the next big thing.