So, this was the explanation for that Teeter Dance Vileplume you saw earlier:
Gen 7
[](http://pokemondb.net/pokedex/vileplume)
Vileplume@Grassium Z
Ability: Chlorophyll(Should be out once Sunny Day is in effect.)
Nature:Timid(+Spd,-Atk)
Evs: 4 Hp, 252 Sp.Atk, 252 Spd
Moves:
Petal Dance
Teeter Dance
Strength Sap
Sludge Bomb
Explanation:Petal Dance is Vileplume's strongest STAB move. It will last 2-3 turns before becoming confused. If you're going to be confused, the foe should get confused from Teeter Dance. Strength Sap is for healing while lowering the foe's attack. This could theoretically be useful on a foe with high Attack. Sludge Bomb is another STAB move that has a 30% chance to poison. Timid Nature plus Special Attack and Speed Evs could help Vileplume become a good sweeper. Grassium Z is for a 190 base power Bloom Doom. With high Special Attack Vileplume should not be taken lightly.
