Meganium
Synthesis
Reflect / Lightscreen / Earthquake / Razor Leaf
Reflect / Lightscreen / Earthquake / Razor Leaf
Body Slam
Sort of lacks without Leech Seed but this set can help out the rest of your team. Lots of choice here.
Flareon
Fire Blast
Shadow Ball
Toxic / Charm
Return
Bleh.... Flareon isn't that great at all but you might get lucky. Breed with Snubble to get Charm so you can mess with Cursers.
Lapras
Ice Beam
Thunder Bolt
Confuse Ray
Rest / Sing
Crobat sucks. Electric / Ice combo lands at least a neutral on everything except Magneton and Lanturn.
Tyranitar
Curse
Earthquake
Roar / Fire Blast / Surf / Rest
Rock Slide
Classic Cursetar. Curse up then sweep.
Dragonite
Fire Blast / Thunderbolt / Surf / Wing Attack
Fire Blast / Thunderbolt / Surf / Wing Attack
Extremespeed
Thunder Wave
Lots of choice. Maybe consider WRAP to prevent switching

. Wrap might be effective with Toxic
Gyrados
HP Ground
Hydro Pump
Return
Hyper Beam
Focuses on massive attack. Gyarados has terrible Sp.Attack but a STABed Hydro Pump does OKAY damage. Note that Gyarados DOES NOT learn Earthquake in this generation.