Rate my firered pokemon team (can I battle the elite four)?

Question

Lv 57 Arcanine:

Extremespeed

Overheat

Dig

Iron Tail

Lv 56 Kingler:

Surf

Swords Dance

Substitute

Flail

Lv 54 Raichu:

Reflect

Rain Dance

Thunder

Body Slam

Lv 58 Venusaur:

Toxic

Leech Seed

Sunny Day

Solarbeam

Lv 60 Nidoking:

Earthquake

Shadow Ball

Sludge Bomb

Mega Horn

Lv 57 Dragonite:

Thunderwave

Dragon Claw

Aerial Ace

Double Edge

Elite Four:

Lorelei

Lv52 Dewgong

Lv51 Cloyster

Lv52 Slowbro

Lv54 Jynx

Lv54 Lapras

Bruno

Lv51 Onix

Lv53 Hitmonchan

Lv53 Hitmonlee

Lv54 Onix

Lv56 Machamp

Agatha

Lv54 Gengar

Lv54 Golbat

Lv53 Haunter

Lv56 Arbok

Lv58 Gengar

Lance

Lv56 Gyarados

Lv54 Dragonair

Lv54 Dragonair

Lv58 Aerodactyl

Lv60 Dragonite

Champion Blue

Lv59 Pidgeot

Lv57 Alakazam

Lv59 Rhydon

Lv59 Arcanine

Lv61 Exeggutor

Lv63 Blastoise

P.S. I did not use hidden power because the pokemon cannot breed before defeating the elite four

P.S.S. Please help me think what held item my pokemon should have (e.g. leftovers)

Answer 1

 Yes but level up your pokemon a little because THEY ARE TOUGH!