I haven't put any legendaries in this team since I can't compete in Battle Frontier with them but here's what I had before Emerald crashed:



Hitmontop

Level 50

Attacks:

Bulk Up

Mega Kick

Endeavor

Rock Smash




Dragonite

Level 56

Attacks:

Safeguard

Fly

Outrage

Slam




Metagross

Level 57

Attacks:

Calm Mind

Psychic

Meteor Mash

Strength




Tyranitar

Level 56

Attacks:

Earthquake

Thrash

Crunch

Bulk Up




Crawdaunt

Level 60

Attacks:

Crabhammer

Surf

Guillotine

Swords Dance




Zangoose (yes he was shiny)

Level 64

Attacks:

Agility

Swords Dance

Detect

Slash

I was thinking of replacing Hitmontop with a different fighter but I never got the chance to do that.