New Evolutions

Alternate Evolution for Weepinbel
Convinement
Grass/Poison
Ability: Chlorophyll
evovles from Weepinbel with use of Sun Stone

This new evolution was first thought to be a lone, first-stage pokemon that did not evolve into or from anything, until a handful were found living with a group of Bellsprout and Weepinbel.
Its design is still that of the pitfall/pitcher flytrap plant, which led a few professors to believe it was related to Weepinbel, even before finding actual proof.
Unlike its previous evolution, and its cousin, Victreebel, Convinement has leaves for feet, and in turn, has feet. And its arms are instead vines.
The reason for explorers to think it was a new breed was the arrangement and orientation of its body. Instead of vertical like Victreebel, Convinement is usually horizontal, crawling along the ground. This is so that it can hide from prey, appearing to be a dead Victreebel. It only stands up if it is eating or is battling.

Its learnset is just as Victreebel's and Weepinbel's, with moves like Wrap and Vinewhip, along with Stockpile, Swallow, and Spit-up.

New Evolution for Cherrim
Chertree
Grass
Ability: Berry Grow (new); a berry appears as a held item after a random amount of steps are taken.
Evolves from Cherrim depending on Happiness

Chertree was first found in one of the many Ohten forests by a traveling poke-botanist. The botanist noticed that a cheri berry was growing from it, but the "tree" in no way looked like the usual Cherri berry tree. When the tree moved and greeted the botanist, it was clear that it was a pokemon.

New Evolution for Tropius
Troperior
Grass/Flying
Ability: Chlorophyll or Solar Power
Evolves from Tropius when it is traded using new item, Floralizer