Dunsparce

Type Tier
Normal UU
Statistics
Stat
HP
100
403
Atk
70
238
Def
70
238
SpA
65
228
SpD
65
228
Spe
45
188
Name Item

Swagger + Psych Up

Leftovers
Moveset
~ Glare
~ Swagger
~ Psych Up
~ Headbutt

Closest thing to an old standard there is. Glare is a nice move, Swagger the opponent, Psych Up and then flinch away with Headbutt. If they do switch out after being Swaggered to try and escape Confusion, then that just gives you the opportunity to Paralyze something else with Glare. It's totally shut down by Ghost-types, though, because Glare cannot Paralyze them. This works best with Spikes down to punish them for switching.

Name Item

SunnyBeamer

Leftovers
Moveset
~ Sunny Day
~ Solarbeam
~ Flamethrower
~ Return

Total surprise moveset running off of a 228 Special Attack with no STAB? Still, it might work, and it has STAB Return so Blissey doesn't totally block it out. It has a decent movepool, you might as well exploit it. Just watch out for Snorlax.

Name Item

Curser

Leftovers
Moveset
~ Curse
~ Return
~ Rest
~ Sleep Talk / Rock Slide / Iron Tail

It has bad Speed already, so Curse only helps it, really. Standard Cursing set, either go with Sleep Talk for longevity or use one of his other attacking move (Ancientpower boost would go nicely with all your Curses). Not bad, but lots of other Pokémon do this much better.

Other Options

Dunsparce can weaken stuff with Screech and finish them off with Return, but it would do better doing this if it were faster. It can use Spite, but it won't get much use out of it beyond wasting Heal Bell and Softboiled and other such bothersome moves. Thief is pretty good if you are using Screech and don't really have a 4th move to use.

Dunsparce can try out Nightmare to keep any Sleep Talkers at bay, if you are having trouble with them. Zap Cannon works for a nice surprise on the Skarmory who comes in to block you, as does Flamethrower. Zap Cannon has that nice Paralysis, but Flamethrower also hits Forretress, Magneton, Scizor, and Steelix.

Opinion

Nothing amazing here, just a typical Normal Pokémon with average stats, excluding its good HP and low Speed. Has an above-average movepool. In the end, however, it's just a middle tier UU Pokémon at best, with its best options being Glaring things and trying to get lucky with flinches.

Counters

Steel / Rock Pokémon resist most of what Dunsparce can throw at them. Cursers can just set up faster than Dunsparce can damage them, and stuff like Snorlax and Miltank will outdamage Dunsparce in a Curse war. Other heavily defensive Pokémon will do much of the same.