"Grovyle is a powerful and skilled warrior. He's also willing to do anything to alter the dark future in which he lived, even if it meant dying himself or outright killing others, as he nearly killed Azelf and the partner when they stood between him and a Time Gear. 

As Dusknoir pointed out in the Special Episode In the Future of Darkness, Grovyle is shown to be rather innocent in nature, especially after he was attacked with Ice Shard by a group of three Snorunt over on Frozen Island as a prank, easily angering Grovyle; however, he also pointed out how Grovyle's innocence also shields him from being influenced by the future's darkness, indicating a strong will that exists within Grovyle. Grovyle's strong will seems to be his main driving force in restoring the dark future to what it once was. Grovyle seems to be very motivational to those around him, especially when he was able to get to Dusknoir, after recovering from battling four Glalie and a Mamoswine, changing his dark and evil ways, slowly allowing Dusknoir to redeem himself; the same thing could be said with the six Sableye when Grovyle motivates and persuades the Sableye to change their ways, as their changes of heart helped spare Dusknoir from Primal Dialga's wrath."