Sceptile

Sceptile is a great non-mega/non-shadow Grass Type attacker. It's very capable in this role, but it's also frail and tends to be outclassed by Pokemon of other types when grass is not 2x effective. It's not a horrible investment, but it's probably better to farm down Grass Type shadows unless you're also preparing a Mega Sceptile

Best PvE Offensive Moveset

• Bullet Seed should be paired with Frenzy Plant* if possible for maximum damage and Grass-type DPS.
• Leaf Blade is a good alternative, but it is a bit behind.
• Fury Cutter is viable, as it outperforms Bullet Seed when both hit for the same level of effectiveness. It can even be viable when not Super Effective due to its high energy gains.
• Earthquake, Aerial Ace, Breaking Swipe, and Dragon Claw don't perform as well, and also lack STAB. 

Best PvE Defensive Moveset

• Bullet Seed is superior to Fury Cutter due to higher base damage.
• Aerial Ace and Dragon Claw are superior to Leaf Blade due to better counter coverage.
• Breaking Swipe is a worse Dragon Claw on defense.
• Earthquake provides nice type coverage but can be slow.
• Frenzy Plant performs okay but lacks coverage.

Bullet is preferable over Fury Cutter for its faster energy gains and greater STAB damage output. 

Leaf Blade is one of the best charge moves in the game, and with a very low 35 energy cost, along with STAB, is pretty much mandatory for Sceptile. Unlike other Grass-type starters, Sceptile doesn't "need" Frenzy Plant, but it does provide a harder-hitting option. The rest of Sceptile's charge moves are optional to provide coverage, with most of them being viable depending on the format and your playstyle. Earthquake is a very powerful move that provides wide coverage, though 65 energy can be a bit expensive. Aerial Ace is a lackluster move even against Fighting-types (Leaf Blade still has a higher DPE), but does have a niche against other Grass-types.