beginner friendly

Put both shaymins on the bench if you can to keep your pokemon alive. Don't put energy on shaymins, use energies on other cards. If taken damage, use fragrant flower garden to heal. If you get low, retreat and put up other Pokemon on bench, not shaymin. Benched Pokemon will get shaymins heals too, so you can get back to full hp and go back to the active.

Preferably start with your turtles and charge them up with Kiawe and clean up with Incineroar at the end. But opening with Incineroar and cleaning up with a turtle afterwards isn't that bad, but it will be easier for your opponent to score 3 points that way. Incineroar can immediately swing with fire fang when coming off the bench which is why you play him instead of something like Charizard or Infernape that take longer to get started since Turtonator will be eating up your energy every turn it attacks.

Simple deck that combines Lucario's damage buff with the Machop/Machoke/Machamp ex high damage output and survivability. 

Use only Metal-type energies!!

Hyper acceleration! Energy acceleration go fast. Best start is usually manaphy. If going second, just put manaphy in active to make opponent think you got no pokemon and are bricking. Can't afford to be early punished by sabrina. Start eevee? Pray you get manaphy. Eevee is the one that does 20 damage because damage needs to be guaranteed against caped pokemon. Build energy to vaporeon, palkia ex. Irida is here to reduce cyrus chances. Misty for more hyper acceleration! Pull off 150 and bench damage by your second turn! Doesn't do well late game, and gets crushed by electric decks.

Steel energy only!

Saw this deck concept, tried it and it worked, so I thought I might post it here...

The idea is to get Dialga in the Active spot as soon as possible and start giving away energy to Arceus and Mew on the bench. Mew is there to try to deal with opposing Charizard and other heavy hitters.

We have only 6 basic pokémon cards here with ways to get the bench full for Arceus.

The basis is to stop the opponent from using any trainers. Psyduck to start until gengar is fully developed. Can use amber to tank.