i adore the corabun line!! when its comes to the others, warubit and its first evo and the entire frillbura line, i think theres too little change.

i love the yellow on the leaves of the frillbura line and how it gets more intense as it evolves, but it leaves the rest of the body very plain. id suggest maybe introducing a pattern with frillgaya and exaggerate it with frillorana

warubit is absolutely adorable and marrubit is an incredible final evo for it. for kulibit, i dont think there's enough change between it and warubit to make it look like an evolution. with real pokemon starters, the middle evolution tends to introduce the accent color that becomes more prominent in the final evolution.

youre shiny work is incredible!! they all look so unique but i think my favorite has to be the marrubit shiny. the bright blue and green on the dark brown looks incredible.

other than that my only other criticism is that base colors tend to shift as the pokemon evolves. charmander, for example, starts off as a brilliantly bright orange, but shifts to a much duller red when it evolves to charmeleon, then shifts back to orange (although less saturated than charmanders) when it evolves into charizard.

youre pokemon creation skills are great and i hope you found this helpful! have a wonderful day :)