1.Stats: Should Butterfree get a stat boost, Evolution, Mega Evolution or nothing?
Butterfree has 190 BST gap from Metapod, and gained a small boost, so while any boost is appreciated, it is not too likely.
A side evolution would be weird.
A Mega literally can only work as a counterpart to Mega Beedrill.
2.Should Butterfree get more abilities?
Yes. Butterfree has only two Abilities, and needs one more. Some options would be:
- Gale Wings
- Shield Dust
Yes. Air Slash and Hurricane.
4.What additional typing Butterfree can have?
Psychic, Ghost and Grass are options, so is Normal.