These Pokémon are either available later in the game or are particularly effective against the Elite Four and Champion:
Weavile (Dark/Ice)
- Location: Route 216/217 (as Sneasel, evolves with Razor Claw at night)
- Nature: Jolly (+Spe, -Sp.Atk) or Adamant (+Atk, -Sp.Atk)
- Ability: Pressure (Opponent's moves use more PP)
- Held Item: Choice Band, Life Orb, Focus Sash
- Moveset: Ice Shard (Priority), Night Slash / Ice Punch, Low Kick / Brick Break, Swords Dance / Pursuit
- Why: Blazing fast Speed and high Attack, excellent against Dragon, Psychic, Ghost, and Grass types.
Gyarados (Water/Flying)
- Location: Any fishing spot with Old Rod (as Magikarp)
- Nature: Adamant (+Atk, -Sp.Atk) or Jolly (+Spe, -Sp.Atk)
- Ability: Intimidate (Lowers opponent's Attack)
- Held Item: Leftovers, Life Orb, Wacan Berry
- Moveset: Dragon Dance, Waterfall, Ice Fang / Stone Edge, Earthquake / Bounce
- Why: Intimidate is fantastic, Dragon Dance boosts its already great Attack and Speed, making it a potent sweeper.
Togekiss (Fairy/Flying - in Gen 4, Normal/Flying)
- Location: Evolve Togetic (from Togepi Egg) with a Shiny Stone
- Nature: Modest (+Sp.Atk, -Atk) or Timid (+Spe, -Atk)
- Ability: Serene Grace (Doubles chance of secondary effects)
- Held Item: Choice Scarf, Leftovers, Sitrus Berry
- Moveset: Air Slash (STAB, 60% flinch chance with Serene Grace), Aura Sphere, Flamethrower / Thunderbolt, Nasty Plot / Roost
- Why: Serene Grace Air Slash is incredibly annoying and powerful, good Special Attack, decent bulk.
These Pokémon provide powerful offensive and defensive options, crucial for tackling the toughest challenges Sinnoh has to offer.