Clefable @ Sticky Barb  
Ability: Magic Guard  
EVs: 252 HP / 204 Def / 52 SpD  
Bold Nature  
IVs: 0 Atk  
- Moonblast  
- Stealth Rock  
- Soft-Boiled  
- Aromatherapy

Heatran @ Leftovers  
Ability: Flash Fire  
EVs: 248 HP / 100 SpD / 160 Spe  
Calm Nature  
IVs: 0 Atk  
- Magma Storm  
- Earth Power  
- Toxic / Protect
- Taunt

Rillaboom @ Leftovers  
Ability: Grassy Surge  
EVs: 240 HP / 252 Atk / 16 SpD  
Adamant Nature  
- Swords Dance  
- Grassy Glide  
- Knock Off  
- Drain Punch

Tornadus-Therian (M) @ Heavy-Duty Boots  
Ability: Regenerator  
EVs: 248 HP / 96 Def / 164 Spe  
Timid Nature  
- Hurricane  
- Knock Off  
- U-turn  
- Defog

Melmetal @ Leftovers  
Ability: Iron Fist  
EVs: 40 HP / 252 Atk / 168 SpD / 48 Spe  
Adamant Nature  
- Double Iron Bash  
- Earthquake  
- Toxic  
- Protect

Gastrodon-East @ Heavy-Duty Boots  
Ability: Storm Drain  
EVs: 248 HP / 8 Def / 252 SpD  
Calm Nature  
IVs: 0 Atk  
- Scald  
- Earth Power  
- Toxic  
- Recover

Rillaboom Balance

by Mimikyu Stardust and Vertex (description by Vertex)

This is a standard Rillaboom balance composition that has been recreated and updated to the more casual OU playerbase. Sticky Barb without Trick seems odd, but Sticky Barb can also "stick" to opposing Pokemon if they use a contact move and have no item. For example, if Tornadus-T uses Knock Off on Toxapex, next time Toxapex uses Knock Off on Clefable, the Sticky Barb will attach to it. This gives you a free moveslot to use Aromatherapy in this case to support the team. Why rely on this technique over Trick, you may ask? It is because the metagame has adapted to Trick Clefable through the use of Sticky Hold Gastrodon and Assault Vest Galarian Slowking, not to mention Clefable itself is a great stop to opposing Trick Clefable due to its ability Magic Guard. Heatran and Melmetal are standard partners for Rillaboom's Grassy Terrain, providing defensive utility and breaking power simultaneously. Gastrodon and Tornadus-T complete the defensive backbone, with the latter being able to use Defog, in case the opponent gets up Spikes to limit Melmetal and Heatran's longevity.

Columns Mode / Stat Colours / Light Mode