Sceptile
PROS:
- Very fast
- Can be great in special, physical, and mixed movesets
- Able to learn False Swipe, which is very useful for catching other Pokemon
CONS:
- Mega Evolution is 4x weak to ice
- Very frail
- Weak to a lot of common types, such as Ice, Fire and Flying
Blaziken
PROS:
- Can run physical, special, and mixed movesets
- Excellent coverage attacks
- Great typing and good hidden ability (speed boost)
CONS:
- Very predictable in competitive play
- Good typing, but weak to a lot of types
- Very frail
Swampert
PROS:
- Excellent typing (only weak to grass)
- Can learn a great variety of the HMs in the game
- Very bulky and strong
- so I herd you leik mudkipz
CONS:
- 4x weak to grass
- Very slow (unless mega evolved in the rain)
- Not the best movepool out there