It's like a giga lite version, easier tame for sure since you just need eyes and a dead body to tame one. You don't necessarily need sacrifices like baby rexes, or brontos though it will make it a thousand times easier (as if it wasn't easy enough) and traps? You can play it safe but it's such a hassle to trap one.

This is how I tamed a lvl. 145

Stockpiling wild animals near the carcha, carrying ankys, trikes, and allos, or maybe carnos near the carcha, but not near enough for the carcha to eat em. By using a rhyniognatha, DO YOU NEED A RHYNIOGNATHA?absolutely not, carrying is just easier, but you can just pull aggro on the wild animals with other fliers.

Then, kill the wild animals. THOUGH, YOU NEED 300+ WEIGHT to carry bigger animals for more trust, 100 weight is fine, there's a reason why you stoc pile wild animals.

𝙉𝙊𝙒, 𝙏𝙃𝙄𝙎 𝙄𝙎 𝙏𝙃𝙀 𝘽𝙐𝙂𝙂𝙔 𝙋𝘼𝙍𝙏

Once you drag a dead body near it, it should sniff the air. Stand still. There's a chance it might bug and you won't get trust from the body. After it's done doing the sniffing animation, RELEASE THE BODY AND RUN! them eating the bodies is still an attack. You can die from this.

Kill the other stockpiled animals, drag them to the carchar and repeat till it gets full trust.

𝙒𝙃𝘼𝙏 𝙄𝙎 "𝙏𝙍𝙐𝙎𝙏"?

In Carchar taming, trust is the hexagon thing with the Dino foot symbol on top of the Carchar after feeding a body to the Carchar, if it doesn't show, then it's likely the dead body got bugged and didn't insert to the Carchar's trust bar. If you see the carchar's symbol on top green, then you can ride it.

After the trust symbol green, you have 10 minutes to ride and kill things with it. DO NOT dismount while it's attacking things, You will die because of the carchars bite. It is still a wild Dino, so it can still kill you and your dinos and tribemates.

𝘾𝘼𝙍𝘾𝙃𝘼𝙍 𝙏𝘼𝙈𝙄𝙉𝙂

Now, you DO NOT need a crap ton of preparation for this, just kill stuff while riding it, the tips that say you need a baby Rex, bronto etc, are partially true, If you're on flat mountains, like the highlands in Ragnarok, there's plenty of apex creatures near you, (Don't try to kill gigas or titanos, or other carchas though it'll ruin the taming effectiveness) what I would suggest is killing rexes, brontos or ANYTHING LITERALLY ANYTHING! sure, the taming effectiveness would go down, but just a lil bit.

Btw, you can actually tame this early game without traps or proper preparation, it'll just take longer. as long as you have a flyer

That's how I tamed a lvl 145, so honestly easy, but fun as hell