Castform

Forecast
Changes type according to weather.
Type Tier
Normal UU
Statistics
Min- Min Max Max+
HP
70
- 281 344 -
Atk
70
158 176 239 262
Def
70
158 176 239 262
SpA
70
158 176 239 262
SpD
70
158 176 239 262
Spe
70
158 176 239 262
Name Item Nature

Special Attacker

Choice Specs / Salac Berry Modest
Moveset EVs
~ Ice Beam
~ Thunderbolt
~ Flamethrower
~ Energy Ball
80 Def / 252 SpA / 176 Spe

He gets to almost 400 Special Attack with Choice Specs, and he's not short on type coverage. If you can predict well, this can do some reasonable damage in the lower tiers. Castform can survive most unboosted hits, taking just enough damage to activate Salac Berry and possibly set up a sweep. You can try a Petaya Berry if you've got paralysis support.

Name Item Nature

Rain Dance

Damp Rock / Expert Belt Modest
Moveset EVs
~ Rain Dance
~ Weather Ball
~ Ice Beam
~ Thunder / Energy Ball
80 Def / 252 SpA / 176 Spe

Water-type Castform. Weather Ball is 100 base power, and you get a boost from STAB and the weather. Ice Beam covers Grass-types and any Dragons (Altaria) you may run into. Thunder covers other Water-types and has 100% accuracy in the Rain, but Energy Ball hits Quagsire hard.

Name Item Nature

Sunny Day

Heat Rock / Expert Belt Modest
Moveset EVs
~ Sunny Day
~ Weather Ball / Fire Blast
~ Ice Beam / Thunderbolt
~ SolarBeam / Thunderbolt
80 Def / 252 SpA / 176 Spe

Castform's Fire persona. Ice Beam covers Altaria, Thunderbolt covers Water-types (especially the likes of Pelipper and Mantine), and SolarBeam takes out most other Water and Rock-types.

Name Item Nature

Hail

Icy Rock / Expert Belt Modest
Moveset EVs
~ Hail
~ Blizzard
~ Thunderbolt
~ Energy Ball
80 Def / 252 SpA / 176 Spe

Castform in his wintry garb. Both Ice/Electric and Ice/Grass are good attacking combinations. Throw Flamethrower in either of the last two slots if you're worried about Steel-types.

Other Options

Besides Thunder Wave, nothing really. Sandstorm is rather pointless as he won't change type.

EVs

80 Def / 176 Spe / 252 SpA, Modest. This makes him faster than base 60 Pokémon who don't use a +Speed nature.

Opinion

He's nothing but pure novelty, but he is a fun little Pokémon. He has a great movepool, but poor stats.

Counters

Lanturn takes him unless he has Energy Ball or SolarBeam. Hypno can work, and Grumpig is a fairly safe bet too, especially against the Fire and Ice versions.