Can you tell me if this is a good team?

Regirock: When it learns Zap Cannon at level 49, lose Rock Throw. Be gentle with Superpower, as it cuts your Attack and Defence.

Murkrow: Cool. Why not teach Shadow Ball and lose Night Shade if you can?

Sceptile: Drop Slam and teach Rock Tomb.

Blaziken: Drop Mirror Move for Sky Uppercut at level 59.

Rayquaza: Drop Surf and Hyper Beam and teach Blizzard and Brick Break.

Swampert: Drop Muddy Water and teach Blizzard.

Not bad, but it needs some work.
Regirock*-Teach thunderbolt over ancientpower and try to replace superpower with a move with more pp and no ill effects.
Murkrow*-Delete mean look for something else. Moves which do no damage are not usually useful (in certain rare cases they can determine if the creature is able to win, but only with a handful of moves and pokemon).
Sceptile-I can't help much here.
Blaziken-Teach blaze kick, sky uppercut (learned level 59), arial ace and earthquake
Rayquaza-Swap hyper beam for flamethrower
Swampert-Ought to do fine as is, but you should still probably replace one of the water moves with ice beam.

*My advice for these pokemon is not based on my personal experience, so it may be wise to yield to the advice of others in these cases.

I think that it's a pretty good team altough I think that you should have raised your Blaziken to be your strongest because it was your first Pokemon.

I agree with everything that Cross Stinger said but I just have a suggestion. You should give regirock the white herb which restores any stat loss in battle so when you use super power, his attack and defense will stay up.

I think it is a very good team, just keep training them up except for Swampert. One suggestion is teach Swampert Surf instead of Muddy Water.