Stat Movement is a metagame where the stats are changed for every single Pokemon in this order: HP>Attack>Defense>Special Attack>Special Defense>Speed>HP

Rules
The stats for every single Pokemon are changed in this order: HP>Attack>Defense>Special Attack>Special Defense>Speed>HP
Mega Evolution Stat Upgrades are applied in this order: Attack>Defense>Special Attack>Special Defense>Speed>Attack
I did a bad wording here, so it would be better for me to explain with some examples:

Vaporeon now has a stat combination of 65/130/65/60/110/95 (Originally it was 130/65/60/110/95/65)
Beedrill now has a stat combination of 75/65/90/40/45/80. Mega Beedrill now gains +60 boost in Defense and +70 boost in attack, while it loses -30 in Special Defense (Making the stat combination 75/135/150/40/15/80)
Noticeable Examples

Jolteon and Espeon are now specially defensive walls (Hello 130/110 HP and 110/130 Sp.Def)
Metagross has a stat combination of 70/80/135/130/95/90 and when Mega Evolved, it has 70/110/145/150/105/110, making it sort of a downgrade to the awesome power Mega Metagross has.