>>32641234Got Oddish in a roll in another thread, so I'll post it here.
Good old Oddium Wanderus. Unsurprisingly, its design is rather basic as a first stage pokemon in a three stage line. A cutie whose simplistic design works to its favor, its appeal is an exemplar of and can be compared to that of other round, monocolor grass type first form pokemon with small eyes in Hoppip, Cherubi, and Bounsweet. Oddish feels like it has its own identity compared to these by being based on a weed, a more commonplace and simplistic plant. It also has an evolutionary progression similar to Poliwag, but lacks a bit more detail to work with down the line compared to Poliwag's stomach spiral, tadpole tail, and more expressive eyes and mouth.
The biggest thing I would change design-wise would be to give it some semblance of being a seedling or sprout. Every evolution of this pokemon has flowers involved, yet I see no evidence of this in Oddish. It doesn't even look like the kind of weed that flowers, which would have had a stem or bud by the point of becoming as developed as Oddish's weed looks. Maybe hide a smaller bud than Gloom's in its foliage. Another possibility would be making the bud look like a hat that pushes the foliage down to Oddish like bangs, while not obstructing Oddish's face or below.
Also, as it is, I'd get rid of the poison type as Oddish, since nothing about it really says "poison" to me. Mudkip gets Mud Slap by level up, but it's not water/ground yet, and I feel the same thing works here. Otherwise, he's fine, especially in the context of simpler Gen 1 pokemon.