Also worth noting Primordial Seas is vulnerable to Desolate Lands, Mega-Rays ability, whose name I forget, and lolCloud Nine switch-ins. It also wouldn't play nicely if you decided to do a weather-based team. Still though, it pretty much outclasses Drought in every way... unless it ends after the user switches out. Have the hackers figured that bit out yet or not?
Also,
Jaguar360 : Like Lcass said, it's a pretty good team for someone just starting. Probably better than my first serious attempt at a team (I don't count my 6 Imposter Blisseys as a serious team). Off-hand, you may wish to switch Sacred Fire for Flare Blitz on Ho-Oh, as it can really leverage that move on a MG set, and possibly swap the LO for a Toxic Orb. The LO is just as viable, but TO will protect you from status, so it's worth considering.
Giratina may appreciate running that set with Poison Heal instead of Prankster since all the stuff it wants to burn generally can't hurt it much (like most Contrary Xtwo) or outspeeds Prankster WoW (Frige Kyu-B). And most of the physical attackers that threaten Giratina out, like Gyarados and Yveltal, are fond of PH themselves, so you're not going to burn them anyway.
Gyarados I'd probably swap for Skill Link Kyu-B. It's a vasty underrated threat that can also force a lot of switches by bluffing Refrigerate (safe switch in on something that does not want to take a priority hit). It gets great coverage with Icicle Spear and Bone Rush alone, allowing you to run set-up and other useful moves instead of more coverage attacks.
Meanwhile Empoleon, I'd change. I mean, it has great typing that sometimes I wish I had on my teams, but it is seriously lacking in stats. At 84/86/88/111/101/60, it's bulk, speed, and offenses are all below average or worse in BH, so the only thing it has going for it is the typing.
Also, has Lcass said, you might start having Imposter problems as you keep going higher. Synergizing your team for everything to counter everything is possible, but quite difficult, more so for balanced teams and especially so for offensive teams. You'll want at least a general purpose counter to your sweepers. Which, with what you have right now, would be tricky to find without tinkering with your overall coverage. Even Sheddy wouldn't work well because of your Manectric.
