Sawsbuck

Sawsbuck suffers from the lack of a proper moveset and insufficient stats to see any use in the meta. At best it's a dex filler, but with four variants that are dependent on seasons, it might be a while before you catch em all. 

Best PvE Offensive Moveset

• Feint Attack performs better than Take Down, despite the latter benefiting from STAB.
• Solar Beam gets STAB, and has the best damage output. 
• Trailblaze is a bit weaker than Solar Beam, but it's far easier to use, meaning it will be optimal at times.
• Hyper Beam can't be Super Effective against anything, but still hits quite hard.
• Wild Charge has its niche of being a 2-bar move, but lacks STAB.
• Megahorn has no use. 

Best PvE Defensive Moveset

• Feint Attack has a higher base power, but is resisted by Fighting-type attackers.
• Take Down is decent on defense, but can't be Super Effective vs anything. 
• Wild Charge is preferred for defense due to it being a 2-bar move. 
• Trailblaze is a decent option as well.
• The rest of Sawsbuck's charge moves are too slow for defense, though among them Megahorn is the hardest to dodge. 

Feint Attack sports fairly average stats, but doesn't benefit from STAB. Take Down is one of the worst moves in the game, even with STAB. 

Wild Charge costs the least amount of energy, and ca.5n threaten massive damage, but also carries a significant risk due to its self-debuff. Trailblaze offers a relatively inexpensive Charged Move with solid damage thanks to STAB, and the ability to self-buff Attack. Megahorn costs less energy than the remaining options, and can be useful against other Grass-type Pokemon. Solar Beam and Hyper Beam both cost extreme amounts of energy, and aren't generally recommended due to their poor accessibility.