Butterfree

In many of the biomes across the globe, Caterpie is one of the most common Pokemon encountered. Because of this fact, many players will find Butterfree among the first fully evolved Pokemon in their collection. However, there's a very real reason that it's so common; it's a weak Pokemon even within a weak type like Bug. Finding a weather-boosted Caterpie and evolving it can be nice near the start of the game, but actually investing anything aside from candy and maybe a TM or two into it is definitely not recommended.

Best PvE Offensive Moveset

• Confusion belongs with Psychic if you're absolutely desperate for a Psychic-type attacker.
• Bug Bite paired with Bug Buzz is Butterfree's best bug-type moveset, though since the former is Elite, Struggle Bug works too.
• Signal Beam is inferior and should be left off of Butterfree.

Best PvE Defensive Moveset

• Confusion is one of the best moves on defense, though Struggle Bug has its merits that make it worth considering as well.
• Bug Buzz is best paired with Confusion. Silver Wind is basically the same but weaker
• Psychic is great and is best paired with Struggle Bug.
• Bug Bite is inferior on defense.

Bug Bite is a decent move in PVP, with 3 DPT (Damage Per Turn) and 3 EPT (Energy Per Turn). It mixes best with Signal Beam (75 Power/55 Energy) due to its lower energy cost than Bug Buzz (90 Power/60 Energy) combined with how frail Butterfree is. Psychic (90 Power/50 Energy) is definitely good. It's a strong attack and Butterfree will probably be using it more often than Signal Beam due to its higher damage, even after STAB, It's also Butterfree's only non-bug charged move, and it pairs well with the double fighting type resistance that Bug/Flying brings, which can make Butterfree something of a quasi-counter to some fighting-types that don't know rock-type moves.

This set attempts to double-down on Butterfree's double-resistance to hit Fighting-types harder. Confusion is a great move in the PVP meta, sporting 4 DPT (Damage Per Turn) and 3 EPT (Energy Per Turn), meaning it will sting a bit against anything that is weak to it, while Psychic can put the final nail in the coffin. Like the sound of this set? Thinking about maybe giving it a try? Then go look at Venomoth. It does the same thing only better, and it's STILL not great.