I’ll answer both of these at once, as taking care of both lines is actually astoundingly similar.

In many ways, taking care of jangmo-o or axew is a lot like taking care of any other reptilian pokémon. For one, temperature is important, especially in the case of the tropical jangmo-o (although axew also shy away from cold as well). Thus, always be sure your jangmo-o has a flat rock for sunning during the day and hiding beneath at night. For axew, be sure you have a shelter with nesting materials (such as straw) for nights and a clear space for sunbathing during the day. In colder weather, move both pokémon indoors and provide them with enough space to roam about and a sunlamp. As both are mountainous and cave-dwelling pokémon, they don’t need much more than that to sleep on, so beds aren’t necessary.

Also, be sure they both have clean water dishes, and change this every day. Likewise, line their enclosures with poké litter or straw and change this often. Both axew and jangmo-o, being reptiles, are at a high risk for carrying nasty bugs such as E-coli and salmonella, so changing their enclosure linings frequently minimizes the risk of allowing diseases to spread to you or your other pokémon. Grooming consisting of giving them warm baths every so often further minimizes this risk and, in the case of jangmo-o, helps polish pokémon scales.

As with most dragons, jangmo-o and axew are also primarily carnivorous, but their diets can be supplemented with leafy greens and berries as well. Cleaning their enclosures also removes stray food and prevents rot (especially if you choose to supplement their diets), but when your jangmo-o or axew lives outdoors, you can easily sweep these to an inaccessible corner for easy composting.

When it comes to toys, while they do enjoy chew toys and bones, many axew and jangmo-o do just as well without them. You may even find that your dragons will prefer exploring their environments or sunning to occupying themselves with objects. In a way, this means they’re a little bit more of a challenge than most pokémon to satisfy in terms of enrichment, but that’s where the battling part of their lives come in.

You see, in both cases—but especially jangmo-o’s—it’s necessary to train and battle with them, even if you don’t claim to be a trainer. Even setting up a training dummy would be sufficient, but ideally, you should set up sparring matches between your dragons and other pokémon, as well as create specialized training exercises to develop specific attacks or skills. Either way, it’s important to keep in mind that unlike many other pokémon, battling is mandatory for them, else they won’t be able to develop the skills they need to survive later in life. For example, although haxorus are gentle pokémon, fraxure most certainly are not, and the fact that they aren’t is both the contributing factor to why their tusks are so long and sharp as well as their main method of keeping them pared down to a reasonable length. Hence, training axew from an early age and instilling a strict regimen of fighting and battling allows it to build up the strength, skills, and endurance needed for proper battling as a fraxure. 

In a similar manner, jangmo-o comes from a line that eventually gains the fighting element in its more advanced stages. Additionally, just like fraxure, both hakamo-o and kommo-o are well known for their battling prowess and their predilection to battle each other on sight. Thus, a battle regimen is in a way especially important to jangmo-o, as battling is essentially a part of its nature.

Here’s where the two species diverge, however. While axew and haxorus may be able to get along with their own kind, fraxure actually cannot, as the fraxure stage represents a departure from one’s birth nest to lay down the groundwork for their territory and breeding nest. Fraxure see one another as competition for the same territory, so keeping multiple fraxure of the same gender may get complicated. By contrast, jangmo-o are a more tribalistic species in that they form groups that are highly dependent on one another. Raising multiple jangmo-o is thus sometimes preferred, as members of the jangmo-o line feel most comfortable battling one another. On the other hand, members of the jangmo-o also get particularly enthusiastic about battling one another, so a match between two or more jangmo-o may be just as destructive and violent as a match between two or more fraxure.

In other words, always hold your dragons’ battles outdoors.

Best of luck, anonymous!