0464 Rhyperior

Mud Slap is slightly weaker than Smack Down but provides superior energy generation, making it overall the better move. Smack Down offers a different coverage, but is generally the inferior choice.

Rock Wrecker is a Community Day exclusive move, and is highly recommended for its incredible damage output and very high DPE value. Stone Edge is a direct downgrade in both power and energy cost. Breaking Swipe is definitely the preferred second move, as it sports great power, very low energy cost, and a 50% chance to -1 Attack when utilized.  

Among the lesser options, Surf costs the second lowest amount of energy to use among Rhyperior's moves, and deals respectable damage with good coverage. Superpower provides wide coverage, however its self-debuff effects makes it more difficult to use. Earthquake and Skull Bash demand too much energy to use, given Rhyperior's slow energy gains. 

Rhyperior as a Ground/Rock Pokemon is difficult to use in Great League with the ubiquity of Water and Grass-type Pokemon. While its charge moves are very favorable and its stat distribution relatively average, the major liability of being doubly weak to Water and Grass makes it way too risky to use, especially when considering other competitors in its role. 

Rhyperior's typing and moveset is less relevant in a meta dominated by Giratina. While it can be quite effective against popular Steel-types, other Pokemon can fulfill this role without Rhyperior's two double weaknesses. 

Rhyperior possesses solid stats and a diverse moveset, giving it the ability to threaten just about everything. It only really fears Groudon and Kyogre, making Rhyperior a good safe switch. It pairs well well with Dragon-type Pokemon such as Rayquaza or Dragonite as they can counter the aforementioned Legendaries, while Rhyperior threatens Steel- and Fairy-type Pokemon. With that said, Rhyperior's Rock/Ground typing does suffer from numerous weaknesses and can struggle to cleanly win matchups, forcing it to rely on shields despite its good bulk.