At his start, Garry's access to his power, even when he levels up, manifests through simplicity rather than showiness or power. A lot of his strengths rely on easy moves that his opponents probably already have access to. They're mostly things that revolve around giving himself or others boosted speed, defense, attack, etc. Through his first evolution he really starts to gain the use of his fairy type ability, and the sheen of his lilac hair grows lighter. His abilities then become a bit more prominent, especially the ones that make use of protection. This will become extremely important to him, at his core there's probably nothing he wants more than to be able to protect himself and others from what he deems dangerous and scary situations.

At his second evolution he will gain access to what he will find to be one of his most powerful attacks, which is calling on the moon as an ally to light the way, or to heal himself or others. His normal natured state attacks are very powered up at the last few legs of his second evolution, he will gain access to something similar to "Last Resort", which manifests as a very powerful move that he can only use when the situation is grim and only when he's in the company of others. His powers seem to revolve more around the power of bonds and friendships that he has rather than simply himself.