ITT: We make reasonable forme changes with new moves

Sawsbuck-Spring
Fairy/Grass
Serene Grace
Gets Play rough, Body Slam, Headbutt

Sawsbuck-Summer
Fire/ Grass
Chlorophyll
Flare Blitz, Flame Whee

Sawsbuck-Fall
Ghost/Grass (Plants start to die in fall)
Cursed Body
Phantom Force, Shadow Claw

Sawsbuck-Winter
Grass/ Ice
Fur coat
Ice Shard, Icicle Crash