Tangrowth @ Leftovers
Ability: Regenerator
EVs: 248 HP / 252 Def / 8 SpD
Bold Nature
- Sludge Bomb
- Leech Seed
- Giga Drain
- Hidden Power Ice
• Rhyperior:
136 > 116.
Your best answer is RW where Growth fits well (3 before falling)
220+ Atk Rhyperior Rock Wrecker vs. 248 HP / 252+ Def Tangrowth: 172-204 (42.6 - 50.6%) -- guaranteed 3HKO after Leftovers recovery
On the other hand, Growth kills Giga Drain. Considering the custap berry + Endure it only makes it last one more turn. On the contrary.
0 SpA Tangrowth Giga Drain vs. 252 HP / 36 SpD Rhyperior: 540-636 (124.4 - 146.5%) -- guaranteed OHKO
• Shaymin:
It is a relief that Shaymin does not have Air Slash so it would be a problem. His best answer is his only contact move and Seed Flare stab and there are 4 to eliminate Growth without drop.
4 SpA Shaymin Seed Flare vs. 248 HP / 8 SpD Tangrowth: 111-131 (27.5 - 32.5%) -- 66.9% chance to 4HKO after Leftovers recovery
Instead the best answer to defend against Shaymin is spam Sludge Bomb where I can even poison.
0 SpA Tangrowth Sludge Bomb vs. 252 HP / 0 SpD Shaymin: 142-168 (35.1 - 41.5%) -- 77% chance to 3HKO after Leftovers recovery
• Dragonite:
Perhaps the most complicated of the three since it has one of the best skills in the game as it is very useful Multiscale.
Your best answer is click on Outrage.
252+ Atk Dragonite Outrage vs. 248 HP / 252+ Def Tangrowth: 136-162 (33.7 - 40.1%) -- 32.6% chance to 3HKO after Leftovers
My best answer to counterattack is to use Hp Ice which doesn't take much damage in principle because Nite protects itself well with its ability.
0 SpA Tangrowth Hidden Power Ice vs. 72 HP / 0 SpD Multiscale Dragonite: 94-112 (27.5 - 32.8%) -- guaranteed 4HKO
and here it would be in the next turn
0 SpA Tangrowth Hidden Power Ice vs. 72 HP / 0 SpD Dragonite: 188-224 (55.1 - 65.6%) -- guaranteed 2HKO
Another viable option is to use Leech + Hp Ice with the support of Leftovers.