All for 3DS (Wii U data is not accessible as of the making of this post):
FG FFA/Smash = 27.59% for 1st Place Finishes, 41.54% for Top Half Finishes (This is the go-to room for Conquest attempts, because of the sheer amount of KOs you can rack up in here in 2 minutes, so you can get a decent amount of points in here if you get 3rd or 2nd, and 9+ points for 1st Place Finishes)
Teams = 51% (This is my main room that I go to the most often, so this pleases me)
1-on-1 = 42.92% (I rep my 2 mains on the lefthand side and various other low & even bottom tiers like

&

&

, so it's understandable, and thus, I am OK with that)
As for fighting projectile spam, you could try out my 2 mains that definitely have anti-camp capabilities, and of the 2,
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has the stronger direct anti-camping powers via sheer projectile output to clash with the camper's projectiles, while

has Side B Jump Cancels (for both approaching & scoring big damaging punishes when you DO get in) + Mechakoopas + Cannonballs, which while they aren't as solid at clashing with other projectiles as DH's due to their slow startup, at least they give him more of a response to them then oh say
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, especially with the Side B Jump Cancel essentially giving you a 3rd jump that can lead to an aerial or two for big damage (and at 75+%, it can even lead to Up B --> A (Hammer) for the KO!).
As someone who frequently goes to FG Teams, where camps can be even harder to penetrate with the proper character setups (ex. Double

,

+

,

+

, etc.), these 2 have been among my go-to answers for confronting camps, with

's sheer projectile output breaking into even the most fortified of camps (i.e

+

,

+

), while

has the offensive damage-building capacity to confront the aggressive guards of the camper (ex.

,

,

), while also having Mechakoopas and Cannonballs to get at the camper being guarded (ex.

,

,

).
Other non-traditional answers:

(Bike! Chomp!),

(Pikmin Toss!),

/

(Hylian Shields can straight up block projectiles, and

gets to walk toward the opponent while having his shield still work. Try it against

or
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, and watch the bad ones go on tilt as their stuff fails to faze you as you close in on them. >X3),

(Power Pellet! Fruits! Hydrant! Even Trampoline!),

(Crawling! Header! The Sun!),

(Gravitational Pull! Luma!),

(Side B can pierce! Neutral B can block off some projectiles)
If you're looking for more traditional reflection answers, perhaps these folks may interest you:

/

,

,

,

,

,

,

,

,

(With Down 1)
Absorption answers:

,

,

(once he's out),

(With Down 3)
Sheer Speed answers:

,

(comes with Needles and Burst Grenade!),

(Try sic-cing him on

),

(comes with Eggs! Try sic-cing him on

),

(comes with Paralyzer!),

(comes with Thunder Jolt!),

(comes with Water Shurikens!)
There's also this vid on
Dealing with Projectiles!