After uprising, pit has so many weapons to choose from. They're repping 3 (upper-dash arm, sacred bow, and guardian orbitars) out of the 140+ on pit and 2 more via items (ore club and drill armthing). That's rep of 4 types, too (bow, arm, orbitar, and club).
We still don't have blade, claw, cannon, staff, or paw weapon types represented. I'd love if pitoo was an alt that made use of the other types. During stage 6, dark pit can use any of the following weapons:
First Blade
EZ Cannon
Violet Palm
Ogre Club
Dark Pit Staff
Silver Bow
The silver bow is his signature weapon, which looks identical to pit's bow, only it's silver and not gold. That could be his primary. His other weapons also happen to cover the missing types in the game, except for claw. I do believe the Pandora's claw AR card features dark pit, but I could be wrong.
w/ the vast array of weapons in the game, it's very conceivable for him to be a 'pit clone' w/ very different side/down specials and similar in other regards.
Not saying it's going to happen (KI going from 1 to 3 reps in one game... just... like... kirby), but it's a possibility.