i havent actually trained this, its just an idea of a team, and actually i cant train all of it as you wiill see later on unless i had a hacked one
to start
Special calm mind sweeper kyogre and rain setter upper
kyogre @ leftovers
EVs 252 sp atk, 252 spd, 4 hp
water spout/thunder/ice beam/calm mind
next the reason this team isnt possible
sp sweeper to fit any need
arceus @ water plate or whatever its called
EVs 252 sp atk 252 spd
Thunder/ice beam/flamethrower/judgment
now my walltacular
lugia @ leftovers
EVs 252 HP 52 def 204 spd
Roost/reflect/surf/light screen
next phys sweeper
deoxys A @ choice band
EVs 252 atk 252 spd 4 HP
ice punch/fire punch/extreme speed/super power
now my baton passer
mew @ lum berry
EVs 252 hp 220 spd 36 spD
baton pass/rock polish/swords dance/hypnosis
for my final uberest beast ever!!!!!!!!!
shedinja @ focus sash
EVs 252 atk 252 spd
swords dance/shadow sneak/x scissor/toxic