Just one submission for me today.
Mega-Furret
Type - Normal
Ability - Momentum: Moves which switch out the user have +1 priority
Stats - 85/115/80/45/70/120 - BST: 515
New moves - Parting Shot, Extreme Speed
Play style
Furret is a very outclassed Pokemon, as such I wanted to give it a possibly overpowered ability. Momentum helps keep Furret out of trouble, its mediocre defences really don't want to take a hit, so the ability to get its attacks off consistently makes a big difference. U-turn is a solid way to deal extra damage on opponents and an attempt to steal momentum. Parting Shot gives Furret another way of stealing momentum, instead of dealing damage it gives the next Pokemon a safe switch-in and creates the potential for a free turn if your opponent wishes for an unimpeded Pokemon. Extreme Speed adds another potent priority move to Furret's pool. With a boost from the STAB, it stands to be a good finishing move.
Road kill
Despite almost everything Furret does being a priority move, it's attacks aren't super powerful and it becomes a mind game in which your opponents can steal momentum straight back with their slower U-turns and Volt Switches. Furret has very few switch in opportunities, so most of its momentum steals will be done off the back of your own Pokemon being knocked out.

Mega-Furret
Type - Normal
Ability - Momentum: Moves which switch out the user have +1 priority
Stats - 85/115/80/45/70/120 - BST: 515
New moves - Parting Shot, Extreme Speed
Play style
Furret is a very outclassed Pokemon, as such I wanted to give it a possibly overpowered ability. Momentum helps keep Furret out of trouble, its mediocre defences really don't want to take a hit, so the ability to get its attacks off consistently makes a big difference. U-turn is a solid way to deal extra damage on opponents and an attempt to steal momentum. Parting Shot gives Furret another way of stealing momentum, instead of dealing damage it gives the next Pokemon a safe switch-in and creates the potential for a free turn if your opponent wishes for an unimpeded Pokemon. Extreme Speed adds another potent priority move to Furret's pool. With a boost from the STAB, it stands to be a good finishing move.
Road kill
Despite almost everything Furret does being a priority move, it's attacks aren't super powerful and it becomes a mind game in which your opponents can steal momentum straight back with their slower U-turns and Volt Switches. Furret has very few switch in opportunities, so most of its momentum steals will be done off the back of your own Pokemon being knocked out.