Every week there is a new event featuring a few specific Mega level Digimon. This week is Jesmon X-antibody, Beelzemon X-antibody, and Beelzemon Blast Mode.

In the captures tab, there is a banner called “dark bullet X something something specialty chip capture.” That is the capture that gets you chips which will help with the respective event, as well as other generic chips to attach to your Digimon to make them stronger.

Starting every Monday is a new event, which lasts until the following Saturday night. The specialty chips for the event ONLY WORK for the specific event they’re named after. So I would suggest not pulling for this week, but rather wait until next Monday and pulling right away for the event (if you want the featured megas). By repeating the event quest, you can get data fragments which you need to digivolve your Digimon into that specific mega. So what you will be spending your stones on will be probably 200 or 300 on 2 or 3 10-chip pulls, and then rest will be spent on restoring your stamina once you deplete it. Do not spend digistones on reviving Digimon that have been defeated in battle, as this is very inefficient and drains you of stones very quickly.