Since I am bored, let me list all the Pokémon that can have a possible new evolution, or pre-evolution:
Farfetch'd - I mean it holds a stick. Its not that impressive. Farfetch'd should evolve.
Kangaskhan - This is one of those Pokémon that needs a baby form. I mean Snorlax got a baby form.
Pinsir - If Scyther had an evolution, so should Pinsir. Maybe a baby form as well so it would be like Magmar, and Electabuzz.
Jynx - Same thing with Jynx as I mentioned with Pinsir. It should evolve too.
Scyther - A baby form might be a good idea. Not sure.
Mr.Mime - He is okay, but it should at least evolve as well.
Tauros - It is hardly even used in competitive battling. I bet it would be better if it evolved.
Lapras - It is a wall kinda. But like Chansey, it could use a level up in evolution meaning.
Sudowoodo - I am not sure about this one, but you never know if it could use an evolution or not.
Girafarig - The first Psychic/Normal type I believe. It definitely should at least evolve, or at least have some sort of baby form.
Dunsparce - The underdog Pokémon, Dunsparce. It could be really something if it had a chain of evolutions or something.
Quilfish - Same applies for Quilfish as Dunsparce.
Shuckle - Its okay, but it can as well use a evolution.
Corsola - Its decent, but I have never seen it in a battle. It can be stronger if it had an evolution.
Delibird - Same for Delibird as for above.
Skarmory - Its okay, but it can as well use a evolution.
Stantler - Um... it really needs to evolve.
Smeargle - All it can do is sketch. I bet it be better if it had another form.
Miltank - A wall like Blissey, and a Pokémon that should either evolve, or have a baby form.
Sableye - The first Ghost/Dark type. It could use a evolution.
Mawhile - Its not overly strong, or competitive. It could at least evolve.
Plusle - Needs an evolution, and they could do a name based on multiplication.
Minun - Needs an evolution, and they could do a name based on division.
Volbeat - I don't know about him.
Illumise - I don't know about her.
Spinda - Useless. All I got to say (Panda Pokémon)
Zangoose - Its a strong Pokémon, but could evolve
Seviper - ts a strong Pokémon, but could evolve
Lunatone - wall based Pokémon, but they can improve.
Solrock - wall based Pokémon, but they can improve.
Kecleon - All it really does is change type. Its really cool, but they can make this one even better.
Tropius - I don't know, but its just weird not to evolve this.
Relicanth - Its an ancient Pokémon. All the others evolved, why can't it?
Luvdisk - Useless. All I got to say
Pachirisu - Very cute Pokémon, but cute doesn't always cut it. It needs to get stronger.
Spirtomb - I am not sure on this. It may not even need to evolve.
Carnivine - I am not sure on this.
Rotom - I am not sure on this.