Sunflora

Chlorophyll
Speed doubles in sun.
Solar Power
Loses HP in sun. Special Attack increases 50%.
Type Tier
Grass UU
Statistics
Min- Min Max Max+
HP
75
- 291 354 -
Atk
75
167 186 249 273
Def
55
131 146 209 229
SpA
105
221 246 309 339
SpD
85
185 206 269 295
Spe
30
86 96 159 174
Name Item Ability Nature

Solar Power

Leftovers / Choice Specs Solar Power Modest
Moveset EVs
~ Leaf Storm / SolarBeam
~ Energy Ball
~ Sludge Bomb
~ Hidden Power Fire
252 HP / 252 SpA / 6 Spe

Solar Power is a fun trait for Sunflora, who already has good Special Attack—and with Choice Specs, the results are awesome. You're free to set up Sunny Day yourself, but it's far more useful to have something else set it up for you.

Name Item Ability Nature

Chlorophyll

Leftovers / Choice Specs / Choice Scarf Chlorophyll Modest
Moveset EVs
~ Leaf Storm / SolarBeam
~ Energy Ball / Sunny Day
~ Sludge Bomb / Sunny Day
~ Hidden Power Fire
6 HP / 252 SpA / 252 Spe

The other set. Without Choice Scarf, you hit 318 Speed after Chlorophyll, which beats +Speed 95s, which are some of the faster Pokémon in UU. With Choice Scarf, you can invest a mere 100 Speed EVs to outspeed Persian. Unlike the other set, it's acceptable to set up a Sunny Day here.

Name Item Ability Nature

Subseed

Leftovers Chlorophyll Modest
Moveset EVs
~ Substitute
~ Leech Seed
~ Sludge Bomb / Hidden Power Fire
~ Energy Ball
6 Def / 252 SpA / 252 Spe

Mostly "obligatory", but works with some Sunny Day support to boost the mediocre Speed.

Other Options

Sunflora learns Swords Dance, but Seed Bomb (from Sunkern) isn't enough to make that worthwhile. Grasswhistle is a major gamble but could pay off. Light Screen is a decent choice. Heat Rock is an item choice if Sunflora is setting up Sunny Day itself, which extends the weather's duration.

Opinion

Sunflora's stats aren't bad, it just has a pretty uninspiring movepool. Still, 339 SpA with good STAB hits rather hard. The 30 base Speed is the tough part, and it will be pretty hard to do more with Sunflora than just a few strong hits.

Counters

You can just use Rain Dance—with no sun, Sunflora's power is not anything to be scared of. Fire-types, Hypno, Grumpig, Muk, and Altaria are effective counters to Sunflora.