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Lanturn (water/electric abyssal monster, looks more like evolves when leveled up knowing Dive)
Magcargo (fast fire/steel engine snail that evolves through trade + metal coat, its shell does kinda look like a wheel after all)
Sunflora (Grass/Fire, looks friendly and menacing at the same time, converts sunlight into energy & heat firing off powerful fire blasts. evolves when leveled up knowing sunny day)
Ledian (based on Heroes like Kamen Rider, could be Bug/Fighting? evolves with a dawn stone)
Ariados (based on Villains, with devilish features and a scarier fake face, could be Bug/Dark? evolves with a Dusk Stone)
Jynx (ice/psychic valkyrie/opera singer, evolves when traded with a new item called Freezer)
Dunsparce (split evo, i would make it learn both dig and sky fall at the same level, evolves into a wyrm-like dragon/ground specialized in digging if it knows the former & an amphiptere-like dragon/flying if it knows the latter)
Delibird (krampus & santa claus split evo, evolves into the former when leveled up with low happiness holding charcoal, evolves into the latter with high happiness holding any mail. Ice/Dark & Ice/Fairy respectively,)
Parasect (Grass/Ghost Zombie shroom, evolves when leveled up knowing infestation )
i'd say that some pokémon like Tangela, Sneasel, Misdreavus, Schyter, Mitank and Tauros and Druddingon actually deserve baby pre evolutions so that they can be used during early game as well. also retcon eviolite out of existence