Pokemon team help >_<

[Zazzeh]

Ok on July 21st their having that Gamestop Tournament thingy. Im going for it..Can anyone tell me if my team is any good or what moves should be changed? Just give your opinion =3
Im A total loser..So dont think of me as compatition if your in the San Antonio area. -Cant spell tonight- Eh..>_<

Crobat: Item held: Leftovers
Bashful

Cross poison
Shadow ball
Wing attack
Mean look

Swampert: Item held: Rindo Berry
Sassy

Hammer arm
Endeavor
Earthquake
Muddy water

Electrode: Item held: Magnet
Quirky

Thunderbolt
Mirror coat
Magnet rise
Substitute

Walrein: Item held: NeverMeltIce
Bashful

Sheer Cold
Aurora Beam
Hail
Surf

Charizard: Item held: Adamant orb
Mild

Heat wave
Dragon Claw
Blast Burn
Flamethrower

Roserade: Item held: Big root
Bashful

Giga Drain
Toxic Spikes
Magical Leaf
Grasswhistle

Edit: Edit time woo! ^^ I sorta dislike the idea of having two water types on my team. Im thinking about replacing my Swampert with my Rhypherior.

Rhypherior: Held item: Rindo Berry/ Fist plate
(Cant remember Nature >_<)

Hammer Arm
Earthquake
Stone Edge
Mega Horn