raichu is very chubby makes you just want to poke it.
Nasty Plot Sweeper
Life Orb Lightningrod Timid
Moveset EVs
~ Nasty Plot
~ Thunderbolt
~ Hidden Power Ice / Grass Knot
~ Encore / Focus Blast
4 HP / 252 SpA / 252 Spe
Raichu's access to Nasty Plot is one of the only reasons to ever use it over other Electric-type Pokemon in UU, and it does an amazing job at special sweeping when given the chance to use it. With a Timid nature, after one Nasty Plot boost, its already decent Special Attack is doubled to 558, enabling Raichu to slash through teams before going down. To put this into perspective, Raichu's power output after one Nasty Plot boost is greater than Raikou's after one Calm Mind boost.
Raichu has other perks that allow it to sweep all the more easily; Encore, in tandem with Lightningrod and the popularity of slower Pokemon with support moves, scores it many confident opportunities to attack or use Nasty Plot. If used correctly, Encore gives Raichu a chance to get past Chansey, which can only retaliate with Toxic or Seismic Toss. Even if Chansey manages to defeat Raichu in time, it would have sustained enough damage for another teammate to take advantage.
Aside from the obligatory STAB Thunderbolt, either Hidden Power Ice or Grass Knot give Raichu good dual coverage. Hidden Power Ice is the preferred choice out of the two, as it provides greater overall coverage in hitting Grass-types super effectively. Grass Knot, despite leaving Raichu vulnerable to the likes of Roserade, is notable for removing certain troublesome Ground-types such as Mamoswine and Quagsire. If you feel Encore is unnecessary, Focus Blast can be used to cover Mamoswine, Rotom-H, and Registeel.
hmm after looking at this i may add raichu to my UU team