Mega Escavalier
Type: Bug/Steel -> Bug/Dark
Ability: Shell Armor/Swarm/Overcoat -> Precision (moves with BP of 40 and lower have their BP doubled; basically a more precise Technician)
New Moves: None
HP: 70 -> 70
Atk: 135 -> 165 (+30)
Def: 105 -> 85 (-20)
SpA: 60 -> 60 (+0)
SpD: 105 -> 85 (-20)
Spe: 20 -> 130 (+110)
Flavor Concept: Escavalier abandons his armor, looks like a blend between Escavalier and Karrablast
Competitive Concept: Whoa nelly, look at that turnaround! I like Megas that take mons in a new direction, so I decided to work with the ongoing theme of Karrablast’s armored journey and have the knight go rogue. Losing the armor increases speed drastically while lowering defenses, but not as drastically as Accelgor.
The new dark-type wasn’t just slapped on, but has two purposes: one, flavor-wise, as a rogue knight, Escavalier’s shed his steel for a more offensive, say, “evil” typing. Second, look at his new ability. I hate new abilities for the most part, but this one allows me to keep Escavalier’s tiny movepool and maximize its advantages.
Any move 40 BP and lower is doubled. Now, what relevant moves does Escavalier have that are under 40 BP?
Twineedle: suddenly this move becomes Bonemerang, a dual-hitting 50 BP move, but with perfect accuracy and a chance to poison.
Rock Smash: now an 80 BP Fighting attack with that sexy 50% defense drop chance. And the grand winner,
Pursuit: which is now 80 BP whether or not the foe switches, before STAB. Perfect for our evil, avenging knight.
(Also, Peck is now 70 BP, which isn't the best in the world, but still beats Aerial Ace if you want Flying coverage.)
Precision also allows for a few gimmicky moves, like Fell Stinger and Fury Cutter (and lol False Swipe), to be just a little less gimmicky. Just a little.
The way I see it, Scizor already has the powerful Bug/Steel niche down pat, and Forretress is a better defensive mon than Mega Escavalier could hope to be unless we radically change its movepool. This way, Mega Escavalier gets to be its own mon.