To tame this creature you have to passively tame it, the best way of doing this is to put on a full set of ghillie as that supply's stealth, then you Aproach it from behind crouching and Feed it a beer!
In order to tame a Chalidithering, you will need beer. A Ghillie suit is not necessary but it is recommended.
1 feed the first beer. After the first feed you will need to wait around 10 minutes and 30 seconds in order to feed the second.
2 after the second beer is fed, any feeds after that will require you to wait around 1 minute and 30 seconds.
3 so first beer then wait 10min 30sec then second beer wait 1min 30sec and feed the rest of beers waiting 1min 30ec between each beer.
Even if you are wearing ghille staying near it too long will cause it to agro,so I suggest setting a timer for about 2 mins after its feed time becomes more frequent due to the initial wait time of 5+ minutes on high lvls.
Chalicos spawn all over the map, so don't limit your search to the snow biomedical. The best way to tame on is to lead it into a trap, leave to lose aggro, then return in full ghillie with pillars. Pillar around the Chali so it cannot move, the just stand next to it and feed it beer! This way of taming also allows you to keep a friendly dino nearby to hold the bear and protect you while taming. Once tamed, a chalico has 3 attacks: a sweeping stationary attack that can harvest berries (left click), a running bite attack that can harvest berries (c), and a rock throw that can harvest meat even at a distance (right click). The rock throw inflicts a poison that increases hunger on the target you are fighting.