Rate my Sapphire team...

[Kaboom]

All Pokemon are level 100:

BLAZIKEN (Leftovers):
Slash
Mirror Move
Sky Uppercut
Flamethrower

RAYQUAZA (Shell Bell):
Fly
Rest
Hyper Beam
Crunch

KYOGRE (Shell Bell):
Ice Beam
Thunder
Sheer Cold
Water Spout

REGISTEEL (Leftovers):
Metal Claw
Iron Defence
Thunderbolt
Amnesia

GROUDON (Shell Bell):
Earthquake
Solarbeam
Fissure
Eruption

SHEDINJA (Lum Berry):
Shadow Ball
Fury Cutter
Screech
Hyper Beam

Any suggestions are welcome. I do have other Pokemon which I may use depending on the circumstances (such as Wobbuffet [Shadow tag] and Altaria [Perish song] in double battles which guarantees a double KO in three turns provided Wobbuffet survives), but these are the ones I use most often.

[Charizard9999]

Not bad, here's my changes in bold.

Originally Posted by Kaboom

All Pokemon are level 100:

BLAZIKEN (Leftovers):replace w/ White Herb
Slash
Mirror Move
Sky Uppercut
Overheat

RAYQUAZA (Shell Bell):
Fly
Dragon Claw
Hyper Beam
Crunch

KYOGRE (Shell Bell):
Ice Beam
Thunder
Rain Dance
Water Spout

REGISTEEL (Leftovers):
Metal Claw
Iron Defence
Thunderbolt
Amnesia

GROUDON (Shell Bell):
Earthquake
Solarbeam
Fissure
Eruption

SHEDINJA (Lum Berry):
Shadow Ball
Fury Cutter
Screech
Hyper Beam

Any suggestions are welcome. I do have other Pokemon which I may use depending on the circumstances (such as Wobbuffet [Shadow tag] and Altaria [Perish song] in double battles which guarantees a double KO in three turns provided Wobbuffet survives), but these are the ones I use most often.

[HobbesI]

BLAZIKEN (Leftovers):
Blaze Kick
Bulk Up
Sky Uppercut
Earthquake
This looks like a good moveset but you might want those two moves for a physical sweeper. Blaze Kick is for a STAB and The other two will be boosted by Bulk up.

RAYQUAZA (Persim Berry):
Ice Beam
Outrage
Flamethrower/Thunderbolt
Crunch
What is it with hyper beam? Ice Beam is to take care of opposing rayquazas and Crunch is for Metagross and Alakazam. The last one is just a filler move.

KYOGRE (Shell Bell):
Ice Beam
Thunder
Calm Mind
Water Spout
OHKO moves are bad. They rarely hit.

REGISTEEL (Leftovers):
Lock On
Iron Defence
Zap Cannon
Amnesia
Registeel doesn't have a good attack. You need to raise your stats then Lock on and zap 'em. Registeel can stay in for a while.

GROUDON (Shell Bell):
Earthquake
Solarbeam
Fissure
Eruption
OHKO moves are bad. Replace Fissure

SHEDINJA (Lum Berry):
Shadow Ball
Dig
Screech
Aerial Ace
Um... why are you using Shedinja? Anyway... there's its moveset... You might need a rapid spinner to take care of the popular skarmory with spikes + whirlwind.

OK team for in-game, but if it's battling other people, you need to make some adjustments.

[- Flavaquil -]

Okay, firstly. Rayquaza with Kyogre or Groudon on the same team? No... that's gonna screw you up, even in-game. Suggestions in quotation.

Oh and two simple rules to remember,
1) Never put two moves of the same type on the same moveset
2) Don't use HM moves unless it's called Surf.

That'll help you in making a team even better.

Blaziken @ Leftovers
Adamant/Jolly Nature
- Fire Blast/Overheat
- Swords Dance
- Brick Break/Sky Uppercut
- Earthquake/Rock Slide

Rayquaza @ Leftovers
Lonely Nature
- Extremespeed
- Earthquake
- Dragon Dance
- Rock Slide

Kyogre @ Leftovers
- Surf
- Ice Beam
- Thunder
- Calm Mind

Registeel @ Leftovers
Careful Nature
- Iron Defense
- Rest
- Seismic Toss
- Toxic

Registeel sucks... sorry, but seriously consider switching it for something else. Even as a defensive wall it's no good

Groudon @ Leftovers/Shell Bell
Adamant Nature/Jolly Nature
- Earthquake
- Fire Blast
- Rock Slide
- Swords Dance

Shedinja @ Choice Band
Adamant Nature
- Baton Pass
- Hidden Power (Fighting)
- Shadow Ball
- Silver Wind

Overall, your team is quite unbalanced. It would do fine ingame, but you'll definitely be hit hard competitively. Having Groudon, Kyogre and Rayquaza on the same team kills off your own combinations.

[HobbesI]

Yeah. It won't hurt to have only Kyogre, but all three? Instead of having all three, you could have three pokemon that counter Kyogre, Groudon, and Rayquaza. Because they're so popular.

[Kaboom]

Thanks for the suggestions - the only person I can battle around here is my younger brother and he's not too good at training.

A little info for those who don't know: OHKO moves' accuracy is affected by the difference in level. Lv100 pokemon very rarely miss ingame, and my brother's best pokemon is Lv 75. So I'm keeping Fissure and Sheer Cold.

HobbesI, Blaziken's Flamethrower has STAB, and it's nature makes it more of a Special attacker. Ice Beam on Rayquaza is superfluous as Kyogre has it, and Hyper Beam is the "Heavy Artillery" of the team. Registeel is my Annoyer pokemon, designed to survive for ages and do gradual damage. Shedinja is decent with its Wonder Guard, and the Screech - Hyper Beam combo can KO most pokemon easily, its nature gives it boosted Attack. Kyogre's Thunder counters other Kyogre, its Water Spout counters Groudon, and its Ice Beam counters Rayquaza.

Flavaquil, Fly has 105 power with STAB (Rayquaza is Flying/Dragon), and the only time I have two moves of the same type on a pokemon is if one of them is a OHKO. Will probably substitute Balziken's Slash for Rock Slide, though.

[- Flavaquil -]

Originally Posted by Kaboom

Thanks for the suggestions - the only person I can battle around here is my younger brother and he's not too good at training.

That's too bad... it's more fun when you have others to battle (not saying I'm not in the same position.)

Originally Posted by Kaboom

A little info for those who don't know: OHKO moves' accuracy is affected by the difference in level. Lv100 pokemon very rarely miss ingame, and my brother's best pokemon is Lv 75. So I'm keeping Fissure and Sheer Cold.

Where did you get that information from? Those moves' accuracy are always base 30 regardless of level.

Originally Posted by Kaboom

Flavaquil, Fly has 105 power with STAB (Rayquaza is Flying/Dragon), and the only time I have two moves of the same type on a pokemon is if one of them is a OHKO. Will probably substitute Balziken's Slash for Rock Slide, though.

True, well reasoned. But, for a two move attack, you could deal more damage with two Extremespeeds and still am able to survive any assualt from something else.
OHKO moves aren't ideal, especially in competitive teams.

Also, Registeel is pretty much useless as an annoyer. Your opponent will usually just EQ it, and since it's not having Levitate, that's one down and the rest to go.

And as for the idea of Kyogre as a counter against other R/S/E legends, Surf > Water Spout.

[HobbesI]

Yeah, if you really want an Annoyer, then you're going to have to go with Shuckle or Ludicolo.

And who told you that OKHO moves' accuracy is effected by level? Whoever told you that is sprouting gibberish. And you never actually told us the natures. And Hyper Beam's one-turn wait afterwards isn't worth the 150 base power.

[Kaboom]

If OHKO moves aren't affected by level, explain how come my Articuno's Sheer Cold never missed on Colusseum against the first 40-odd trainers, when the level difference was over 40, explain how come Kyogre's Sheer Cold hasn't missed yet against Drake's Salamence, and how come Groudon's Fissure has never missed Steven's Metagross? (OK, so I could defeat them with other attacks, but you gotta win with style!)

Ingame, Hyper Beam nearly always KOs, so you can switch without the wait! :-P
Shedinja's Hyper Beam usually isn't a problem due to Wonder Guard.

It is true that I have to be careful with Registeel, but even Groudon's EQ only inflicted 50 damage without any Iron Defences (out of 320 total HP - recovers in three turns with Leftovers.) Blaziken are more of a problem - they usually have Fighting AND Fire moves and STAB to go with them, so better switch out then!

As for a decent Annoyer, I've added this to my collection, replacing Registeel from time to time:

CACTURNE (Leftovers):
Ingrain
Leech Seed
Giga Drain (PP max)
Spikes

Only problem is, even with Giga Drain on PP max, that's still only 8...

Oh, yeah, what's with giving Shedinja a Choice Band? a- I don't know how to get it, and b- what good does it do?

[HobbesI]

Originally Posted by Kaboom

If OHKO moves aren't affected by level, explain how come my Articuno's Sheer Cold never missed on Colusseum against the first 40-odd trainers, when the level difference was over 40, explain how come Kyogre's Sheer Cold hasn't missed yet against Drake's Salamence, and how come Groudon's Fissure has never missed Steven's Metagross? (OK, so I could defeat them with other attacks, but you gotta win with style!)

Either your lying, exadurating, or extremely lucky.

Ingame, Hyper Beam nearly always KOs, so you can switch without the wait! :-P
Shedinja's Hyper Beam usually isn't a problem due to Wonder Guard.

If you switch out, it still takes two turns.

It is true that I have to be careful with Registeel, but even Groudon's EQ only inflicted 50 damage without any Iron Defences (out of 320 total HP - recovers in three turns with Leftovers.) Blaziken are more of a problem - they usually have Fighting AND Fire moves and STAB to go with them, so better switch out then.

As for a decent Annoyer, I've added this to my collection, replacing Registeel from time to time:

CACTURNE (Leftovers):
Ingrain
Leech Seed
Giga Drain (PP max)
Spikes

Only problem is, even with Giga Drain on PP max, that's still only 8...

Cacturne isn't a good annoyer. It's built for sweeping. Like I said before, use Shuckle or Ludicolo. Here's a Ludicolo set...

Ludicolo @ Leftovers
[Rain Dish]
-Leech Seed
-Toxic
-Dive
-Rain Dance

And shuckle set...
Shuckle @ Leftovers
[Sturdy]
-Toxic
-Rest
-Safegaurd/Substitute
-Double Team

Oh, yeah, what's with giving Shedinja a Choice Band? a- I don't know how to get it, and b- what good does it do?

Choice Band is an item you can get at the battle tower... and it increases the damage done by physical moves by 1.5. But, you can only use the first move you used when you sent out that pokemon. You can use a different move if you switch that pokemon out and back in.