How to tame!!

3 Metal Gates (not behemoth)

1 Large bear

Make the trap like the top of a triangle sort of then bear trap middle, lead the carch into the trap and place last gate behind to make triangle, kill stuff that’s around you and drag it over to the carch and it will do a sniff animation and then drop a dead body infront, it will show a trust meter kill things and drag it over to the carch until the trust meter is full when it’s full remove back gate and u can ride it for 10min in that amount of time u have to go running around killing stuff and it’s bar will go up

THIS MAY TAKE A FEW TRIES

I was searching for high lvl rexes on lava island and found a 145 carch on lesser one instead. I instantly decided to tame him and spend like 1,5 total. A lot of time he was doing stupid things but now I understand how to tame it, how I did it in the end:

Crafted like 4 stone gates, placed 3 in the form of half circle

Agroed him and made him attack gates

While he was busy locked him

Went away to rerender, it will make him stop attacking gates

Lure a rex and kill it

Grab his body and offer him

If he doesn't sniffing or eating rerender again

After he eat it freed him

Commite massacre killing rexes, carnos and argies

We are friends now, he is awesome:)

Up this if you think it helps! Carchar will be buggy when trapped and could constantly attack giving you no chance at gaining trust. Seems to prefer small dinos and doesn't try eating flyers. If it misses the first chomp on the corpse then it will no longer gain trust on the corpse you are feeding it. You must be carrying the corpse while it is feeding on it. I found it easier to gain trust by building a walkway so it has an easier time chomping the corpse. After gaining full trust I found it easier to gain taming on extinction with the amount of dinos near the spawn. I highly recommend using an elixir on high level carchars so that you can tame it without having to gain it's trust again.

Finally some last pointers to help out...

I found using a baby rex (boss rex) was instant trust when it chomped on the corpse. Carchars will likely sniff the corpse you bring it and not chomp, meaning you have to render in the area by leaving or you may or.may not have to kill it if it stops trying to chomp the corpse. I forgot to mention that I don't know if just any baby rex will do so be wary of that. The carchars will most definitely kick you off after it reaches 100 stacks, so take it back to your trap before 98 stacks. That should be all you need to know! Hopefully this helps!