V Reverse: Megacolony Mutant Giraffa

Giraffa Reverse and Non-reverse Giraffa has an abilities make your opponent feel a lot of pressure because they must choose card from hand and force to call to RC. It's mean they will always call normal unit. But the AUTO ability of that unit will not activate. 

I recommended on the first G3 turn, you shoud ride Non-reverse Giraffa and has at least 1 other G3 Giraffa in hand and call that to RC. Non-reverse Giraffa will put that G3 Giraffa to your soul for the next activate of Giraffa Reverse. Spear-attack Mutant, Megalaralancer has the same cost can put your G3 Giraffa to soul.

If you fight with Aqua Force or Nova Grappler, Stealth Millipede is the anti-restand unit. I may think about Brilliant Blister or Mutant Gentlemen, High Class Moth but Stealth Millipede has both useful of those unit. He make your opponent's rear cannot stand even in main phase or battle phase, and can be use to Counter Chagre. Your opponent must think a lot if they want to play. Because with ability of Giraffa, they will call 1, 2 or more in rest. And when Stealth Millipede boost, if your opponent let it hit, 2 of your opponent RC cannot stand in next turn, if they guard, you will have 1 Counter Chagre, +1 Soul and your opponent take 1 damage. It is a win-win situation.

Vulgar Mutant, Stamping Red in here to negate some CONT ability or AUTO. With Giraffa, they will call to the RC that has Cradle Maker, if they do, you can add 1 card same grade as that rear. If you add G3, you can add Giraffa Reverse or Non-reverse Giraffa, G2 has Elite Mutant, Giraffa and Stamping Red, G1 has Stealth Millipede.

Some option that you can do:

+ Brilliant Blister: With ability can put himself to hand and draw 1. He is the best Defense in this clan which can stop 1 opponent rear's attack. But because he need VC to be rest so he can only guard when VC battle, your opponent can use all rear to attack frist then VC attack in last and this unit will be useless.

+ Mutant Gentlemen, High Class Moth: I recommend playing him with Area Stiler because you don't have card to interact with G3 in soul. Giraffa Reverse only count G3 Giraffa so he not useful but with the ability can Counter Chagre 1 every turn shoul make him some good.

+ Pincer Attack Mutant, Intrude Scissors can be used in every Megacolony deck and give you 2 attack more.