You coulda named Quilava something like "BurningLow" or something, I dunno.
Also, if you're going for a physical Butterfree, if it has Compoundeyes ability, you're gonna want Sleep Powder, Bug Bite (Caterpie lvl15)/U-Turn, Aerial Ace, and some fourth thing.
Impish Bellsprout --> Victreebel:
Leaf Blade (Lvl 47 for Victreebel)
Gastro Acid (Lvl 47 for Weepinbell)
Secret Power (For the shit of it)
Knock Off/Whatever
To be frank this is exciting for me, technically the gen I know the most is 5 since I put the most hours in BW and know almost every poke in that game. These I know only from watching the anime as a kid.
For a "friend" you sure know close to nothing about me
If something is a bug, has bugs or is inspired by bugs doesn't mean I like it. For example Hollow Knight, A Bug's Life and most ant games do nothing for me. Just because I like bugs doesn't mean I have to like them all, after all for a group that contains around 80% of all complex life on the planet I can afford to be choosy