Sceptile

Sceptile (ジュカイン Jukain) is a -type Pokémon introduced in Generation III. It is the final evolution of Treecko, a Starter Pokémon in the Hoenn region. It resembles a cross between a tree gecko and a Dilophosaurus, with bladed leaves near its wrist and a cluster of seeds growing on its back. Its name is derived from "scepter", the staff of a king, and "reptile"; hence, it is known as the "King of the Jungle". Many trainers prefer this speedy lizard because of its decent amount of health and its high speed stat; it has an advantage in forests, jungles and other grassy areas, where it leaps among the trees with great agility and ambushes its opponents from above. It carefully tends its seeds, whose nutrients revitalise the trees around them. It has the Overgrow ability; its moves may include Energy Ball, Leaf Storm, Focus Blast, and Dragon Pulse, a moveset usually used together with the hold item Choice Specs.

In the Anime
During the Battle Frontier arc, Sceptile was the most powerful Pokémon that Ash ever had. Sceptile is voiced by Darren Dunstan (4Kids) and Bill Rogers (PUSA/TAJ)

Trivia
It can be sent up against powerful Pokémon, Legendary or non-Legendary (depending on type), using either its "SubSeed" combo (Substitute & Leech Seed) or just attacks directly with the Choice Specs set, or the unique Physical set which often holds either Choice Band or Muscle Band. Note: It is in the Monster and Dragon egg categories.

Possible Movesets
Sceptile @ Choice Specs, Modest Nature, - Leaf Storm - Energy Ball - Dragon Pulse - Focus Blast

Sceptile @ Leftovers, Timid Nature, - Energy Ball - Dragon Pulse - Substitute - Leech Seed

Sceptile @ Choice Band/Muscle Band, Adamant Nature, - Leaf Blade - Earthquake - Thunderpunch - Dragon Claw