Ok, make the next broken mascot legendary, something similar to Zacian and Miraidon. Under rules:
>BSTs to be max 680, if it has any super form max 710.
HARD MODE
>No Dragon type, no Fairy type, no Psychic type, no Steel type.
Have fun... I hope...

I'll start
>Ghost/Fighting Jaguar Warrior
Region: Mexico or Brazil, I guess
Ability: Sacred Fur (Fire+Ice Immunity with Attack boost)
Signature Move: Shadow Jump (120/100 Physical Ghost move. Ignores protective moves and abilities)
HP: 105
Attack: 155
Defense: 95
Sp.Attack: 80
Sp.Defense: 95
Speed: 150
BSTs: 680

Moves: Close Combat, Shadow Sneak, Earthquake, Knock Off, Swords Dance, Bulk Up, Wild Charge, Flare Blitz, Rock Slide, Rock Tomb, Sucker Punch, ExtremeSpeed, Reflect, Light Screen, Detect, Psychic Fangs, U-Turn...