After taming 3 carchars, this is what I have learned:
-the best way to trap these fellas is a 1x1 of metal dino gateways. You must have a bear trap in the middle of 3 gates to trap the carchar and then put up the 4th gate
-when trapped, the bastards will often refuse to eat, in order to fix this you can leave the corpse by it and simply go out of render from it. All tames must be out of render for this to work. If you left the corpse by it’s feet like I earlier said then by the time you come back the corpse will be eaten and the carchars progress will rise
-In the process of leaving and entering render to reset them, it a a must that you do this in a swiftly manner, as if you load in the carchar before you load the trap in the charcar has a large chance of meshing through your trap. I like to use a dino which can quickly elevate and dive for this
-when you have fed them enough corpses their progress bar will turn green and you can ride them, leave up the trap except for one gateway and start killing anything you see
-it is a good idea to head for highly populated areas instead of going for big kills
-elixirs do work on them so make sure you pop one when the car gets to 70% taming
-I’m not sure if this is possible with our rates yet, but if the car gets to a 99 kill streak it is very important that you roar. If you don’t and you hit a streak of 100 you will be kicked off of the car. Some dinos give a higher boost than just one, so if you feel as though you are getting to close to 100 you should roar sooner
-If you don’t get to 100% before the ten minutes is up it is much easier if you walk the car back into the old trap while you still have control of it. If you would like, you can also put up a new trap around the car while you still have control
-each time you have to feed and mount the car it’s timing effectiveness will tank. It will also fall if you take damage so make sure you don’t hit creatures with a thorn aspect like arthlos or kentros. It is also important that you negate all fall damage by jumping off of them because this drops their effectiveness as well
Might feel a little cheat(y) but if you breed two high level Rexes and hatch the baby near the Carchar, kill it, you can drag it’s body and it’ll instantly be ready to tame. Lower taming rates will require more rexes but it’s effective.
Typically they spawn where ever gigas spawn. Once found one you have to kill some animals preferably a wholly Rhino. once you have the corpse it's a passive tame so makes it better to tame. Slowly walk up behind the Cardo wait till it sniffs the air and run away so it can it can be eaten. When the the hexagon is full above it hop on it as fast as you can and kill everything till it's tamed.
Trap it, kill and drag a couple woolly rhino corpses to it. Do not drop the corpse, it will sniff then eat. You must make the kills. You can then ride it briefly and kill things to give taming progress. You can sacrifice tames for this. Doesn't seem to work with babies. Use caution, it's highly aggressive during the entire process and can hit you while you're feeding or dismount you while riding and attack you. As it makes kills, it gets a bloodrage buff that massively spikes damage output.
I don't know why people are saying level stam over melee maybe it's a pvp thing but in pve i would say full melee just because it is already way more mobile than a giga and surprisingly very close to its damage considering it has no mutations. All I can say is RIP giga carcha is the new king
Level points ONLY into health. The more points into health, the more quicker you can tame the Carchar.
Next, find a Carchar, DO. NOT. TRAP. IT. It will not eat the corpses you bring if it is in a trap. It will also bug out, better to do it without one.
Now you have 2 options, use a throwaway tame or use any Dino in the area to feed the Carchar.
The best way I found, is to use an unclaimed tame that has a lot of points into health - preferably 100k.
Next, drag whatever corpse you chose to the Carchar, and WAIT for the sniffing animation. It doesn’t matter if you also walk up to it after it finished sniffing the air, it will solely focus on the corpse, make sure you run away asap though.
The more the corpse has health, the faster the Carchar will let you ride it. Please remember that.
After dragging the corpses and the Carchar is letting you ride it, you can either go around on a murder spree OR use your throwaway tames.
I used my throwaway rexes that had 100k health in them - here’s the fun part.
Instead of focusing on your Carchar munching away at the rex for 5 hours, you can whistle passive (before bringing taming the Carchar, recommend doing it before you start bringing the corpses) unclaim, then damage your tame till it is VERY bloody.
Once you did that, bring over your Carchar and make sure you are RIDING IT; manually attack your unclaimed tame, and boom. Taming efficiency goes up a bunch.
Highly recommend diplos or rexes with over 100k health as it will tame so much faster, don’t forget to damage them enough so it only takes a few bites for your Carchar!
TDLR: more health on dinos = faster Carchar taming.