All characters and costumes are for looks only and have no effect.
FALSE!!
Certain skins and accessories have many different secret effects!
Its true!! Ive tested with my friend Frank and a PSN friend for weeks and it is true!
Skins and Accessories you can put on your characters have their own secret special effects!!
Skeletons are really hard to shoot because Skeletons have gaps between their bones which means
you have to shoot them on the bones or then the bullets will just go through them!!!
Most helmets, masks and head wraps (ex ISA Helmet, Talbots long nose mask and Katherines Head Wrap) make you invulnerable to headshots.
Sully's Champions Ring makes you do a quarter more damage!
And Sully's Beast Bling makes your punches do double damage and faster healing!
Most glasses or goggles make you immune to the Medal Kickback: Disruption.
The custom villains Dust Storm Face Scarf makes it much easier to see in the Dessert Village storm.
The custom villains Skull Face Scarf makes it easier to stealth kill people.
The custom villains Gas Mask & Ghillie Gas Mask makes you immune to the Medal Kickback Cursed Idle.
The custom villains Heavy Bandolier & Bandolier Open gives you slightly more ammo in the weapons you start with.
The custom villains Merc Armour increases your max health slightly.
The custom villains Headphones lets you hear people jumping, climbing, bullet shots etc better.
The Light Boots in both custom hero and villain makes your jumps go further.
The Combat Gloves in both custom hero and villain make your punchers slightly more faster and stronger and increases pull down radius by %10.
The Combat Boots in both custom hero and villain increases kick off radius by %10.
The custom heroes Ammo Vest gives you slightly more ammo in the weapons you start with.
The custom heroes Combat Pants and Combat Leather Pants makes you receive half damage from all punches.
All Doughnuts (like Doughnut Drake, Lazarevic and Talbot) increases health by %20.
These are all of the Skins and Accessories I've tested so far, hope this is of use to players.