Offering general tips on how to care for a particular type is a bit tricky, anonymous, and the reason why is because even within a type family, different species may require vastly different things. For example, you wouldn’t take care of a seviper the same way you would take care of a standard muk, even though they’re both purely poison-types. Or for a closer comparison, you wouldn’t care for a scyther the same way you would a vespiquen.
Similarly, dragon-types, while all draconic in nature (obviously speaking), all have slightly different variations in care requirements. For example, noivern are nocturnal, eat fruit, and require a perch; garchomp are diurnal, carnivorous, and require wide-open spaces they can burrow into. Axew and jangmo-o are both similar to take care of (as they are both primarily carnivorous dragon-types that dwell in mountains and caves, require a source of heat, and evolve into at least one aggressive stage), but haxorus has a completely different personality from kommo-o and thus requires a different sort of training and psychological support. Granted, this doesn’t necessarily mean they won’t get along at all—and in fact, haxorus gets along quite well with a number of different pokémon, not to mention kommo-o generally feel protective towards anything it considers to be part of its herd or team—but it’s worth keeping in mind.
Then you have pokémon like dragonite and goodra. Goodra, by necessity, needs to be kept moist at all times. Otherwise, the fluids coating and composing its body dry, resulting in cracked skin that may be open to infection—or worse, general tissue damage. Dragonite, meanwhile, don’t necessarily need water to survive (although dratini and dragonair, being lake and river pokémon, do), but as wild dragonite live in and around the ocean, a tame one would be happiest when given a large pool. Thus, these pokémon may be difficult to keep with the aforementioned dragons, but they do quite well with the likes of kingdra and dragalge.
Other than that, goodra are primarily vegetarian (and one of the few dragon-types that are, with noivern being the other), whereas dragonite is an omnivore. Dragonite, additionally, cannot be put onto a full vegan diet, as it needs protein from meat sources to fuel its fantastic draconic powers. Both don’t normally need toys or extensive bedding, but dragonite needs a large amount of space, as it’s both a marine pokémon and one that flies. Letting it out to stretch its wings (so to speak) for a few hours should be enough for it. Goodra, meanwhile, is a less active pokémon and will require very little beyond a normal training routine. It’s worth it to allow a goodra at least an hour to swim, however.
Finally, as both goodra and dragonite fill very similar roles on a team, they can actually train together rather well. It would be a good idea to allow them to work together as they grow and learn new moves, as one pokémon can easily help the other to adjust and perfect their techniques.
In other words, by and large, there are certain combinations of pokémon that may be difficult to raise together, but at the very least, dragonite and goodra are highly compatible. The only differences between them are diet and exercise, really, unlike other dragons that require environments and routines that differ vastly from the more aquatically-inclined dragonite or goodra. If you plan on collecting more dragons than these, it’s imperative to do basic research into the habitats of the dragons you’re considering, as their natural environments will tell you a lot about what you would need to know to raise them—such as, for example, whether or not you can house them in the same enclosures as either dragonite or goodra.
Best of luck, anonymous!
The Pokédex According to Bill 