Hey guys.
Playing Blue Rescue Team, lv.55 Swampert, partner is a lv.54 Charizard.

Would appreciate advice on movesets. Currently Swampert has -
Ice beam
Surf
waterfall
Dive

-Charizard
Fly
Flamethrower
Heat wave
Smokescreen

My biggest problem is running out of PP. I also feel guilty for having a Swampert without Earthquake. Would Earthquake OHKO Charizard? I like to go with Charizard for the type coverage.

I have every dungeon completed but Western Cavern. I have Lugia and Kyogre recruited so I guess I won't be needing Dive anymore.

Also what level is recommended for Western Cavern?

Thanks in advance!