Building an Tag-Team System for Side Scroller

Hello

I'm Building an 2D Side Scroller with Unity where it's an endless Side-scroller, i'm one-man developer building the Core Mechanic of Tag & Assist system for the game.

Tag Core Mechanic:

• Allows you as the player to play 2 characters(Main & Link Partner). The game won't use it until you reach Distance level 3(Level 3)
• It brings out the player's Potential and the game has 4 classes right now:

Rogue

• This Character is extremely fast and is excellent for dodging attacks
• They can fight Close or Long Ranged
• Not endurable, they use Reverse Winds to dodge enemy attacks
• Effective against Speedy Enemies but ineffective against Tough and Large Enemies

Warrior

• This Character is an Tank and Heavy Hitter
• Close-Ranged fighter
• Can Block, Has higher Health and Reduced Damage. Can also Regenerate their Health
• Effective against Tough and Large Enemies but not effective against Swift Enemies

Ranger

• This Character is an balanced with Melee and Ranged
• Has the Rapid Attack to attack either Long or Close
• Can use the Rapid Dash for 3 seconds of Invincibility
• Effective against all enemies but inflicting Fair damage

Mage

• This Character is an Powerhouse with Magic
• Powerful Long Range Spells
• Can use Mana Barrier to protect you from (100 dmg), Can also Regenerate their Mana
• Effective against Enemies that follow you around and Large as well Tough enemies. Not durable at close range, Keep them at an distance

I am going to use these as examples

If the Player plays an Rogue and link with Warrior

The Rogue would get

• An Upgraded Dodge ability that allow him to attack his enemies while dodging
• Reduced Damage
• Pulse Daggers that Allow Piercing and Boosting Attack Power
• The Assist would have an Chance of 15% to defend the Rogue from Certain death

or

The Player plays an Mage but link with Ranger

• The Mage Become Overloaded, Giving them the Buster(Rapid-Fire) to fire fast against enemies
• Can Rapid-Burst through enemies but can do it twice in the Air as opposed to the Ranger doing it once
• Ranger will Move ahead to Automatic attack enemies

The Features of this Mechanic would be

• Tag System allows the player to switch between the Main and the Assisting Companion
• The Player would receive Passive abilities from the Assist Companion
• Uses an Big Bang as an Finisher, if you switch to the Assisting Companion you get use an different Big Bang

PROGRESS

• Right now, I'm building code for the Side Scroller
• I'm not an Animator, Sound Engineer or an Artist, So i'm looking Background, Character Models and Animations such Blocking, Rapid-Fire, Character Deaths, Texture, etc on Various sites
• I'm looking for suggestions on how to build and Code Tag Sytem Mechanic
• I'm building the Game around the Tag Mechanic as do not want to add more features until the game Finished and up-Running
• I'll update more about my progress in June on 1st week