No you said that you're looking for Chariot. So I'm asking you, what do you have for trade with the Chariot? Because I have a Stymphalian Bird which is quite similar to Chariot. I'm not looking for any particular card.
Why cannot go fight anymore?

Only takes less than 5 minutes to finish the 50 battle points, another 15 minutes to finish 5 hunting tix and probably another 5 minutes to oogle on any 5* guardians I can catch. But yeah, I think I'm good with just two. Seeing that I'm actually playing these twos like their both main IDs.

Darkness huh? How about Ballor and Rangda? I actually level up my ace 3* Rangda for wall.

Bro,you hv any maxed lvl?

I know
bt once they let me know tat im confirmed ban
I would spam at their fb
then I would write a letter to their customer service in na n japan
then I would write a letter to apple too
how can they approve a game that is flawed and banning innocent player
as we all know
this game security is very flaw
it was nvr meant to protect players
they can simply ban witout excuses
at least if there is any irregularities
just ban the player who has the card in the first place
they investigate sure can investigate it out lolz

It's been a short time since the giant first appeared. You'll have more chances at it.

Swapped the cards around... go ahead and try

New deck's ATK average 2636 (I'd say closer to A+/S rank), but high on defence!!
Try to clear at least 5 of them. 

Just caught a Chaotic Balor... keep it for rebirth lar.

Its a gone case, bro. Obviously you friend gave you a duped card. You could probably try claim your innocence to SE support.

What cards did your friend pass to you? Can you recall the guardian name & its type?

Also can you tell us what do you have in your current deck, guardian name & type as well.
There's no 100% sure way to tell if a card is duped or not. But there are a few preventive steps that you can take to protect yourself.

First, try not to accept free cards from a complete stranger. This was quite popular a while ago, hackers will send duped cards to random people just to get them banned.

Secondly, check whether the skills & stats of the card is correct. I once met a Nuada with Life Drain skill (fyi Nuada will never learn such skill & there's no item that can teach such skill).

Thirdly, never ever buy any in-game items with your ringgit. Hackers love making money from this, they create fake stuffs e.g. fake 5* card and sell it to you for RM10 or so.

Most of the 5* ace are duped card, hackers love duping 5* ace cause they're the most valuable card & easily sold. So try to stay away from trading for 5* ace cards.

If you trust that your friend is playing legally, then it's up to you to take the risk. What are the cards that he's giving away btw? I'd be more alert if it's a really good 5* card, especially ace types. If it's just decent type, then probably lesser risks.