>>29303672100 base speed isn't great.
Its attacking stats are piss.
Its typing is weak against common elements of the metagame.
Its recovery options are poor.
It's frail, especially physically.
Its HA got nerf'd practically into irrelevance.
Megazard does everything better anyway.
It will never get a mega.
It will never be OU. In fact, it will struggle in most usage-based tiers.