[HGSS] Rate my HG team

[Blue Nocturne]

On my latest HG playthrough, I'm having a lot of trouble finding a good team which effectively covers all bases. I'm looking for two guys to complete the team, and I'm open to replacing people; particularly Blaziken and Rhyperior... Not sure about those two if I'm being honest.

Gengar
Wise Glasses - Modest
Energy Ball
Psychic
Shadow Ball
Focus Blast

Palkia
Lustrous Orb - Modest
Thunderbolt
Surf
Ice Beam
Spacial Rend

Rhyperior
Quick Claw - Adamant - Solid Rock
Rock Slide
Hammer Arm
Megahorn
Earthquake

Blaziken
Charcoal - Rash
Sky Uppercut
Blaze Kick
Flamethrower
Brave Bird

I was thinking of replacing Blaziken for Magmortar and bringing in a Dark type, but for the rest I really don't know what to do without going back to my old team, which isn't something I really want to do. Any suggestions for the 5th and 6th pokemon, as well as changes to my current team, would be much appreciated.