Stags: I am an Invectid warrior, I shall fight to the end!
Despite that it's mostly a funny episode, episode 20 has a very poignant moment at the end. When Hunter tries to end Grasshop's life once and for all... and then misses by a mile. He takes a moment to look at the audience and realizes that Quake wouldn't do that, that's pretty impressive.
In the episode "Protectors of Life" Grasshop must be part ninja, not only for being able to sneak up on the Battle Beetle. But managing to remove its regeneration component without Buguese noticing any of it. Grasshop can actually pretty awesome when he's not cowering in fear.
Grasshop: Someone must have removed the regeneration device? Grasshop!
It's impressive watching Hunter and Corona working together in episode 40 to put their key in the orb. Though admittedly it's Corona who's doing almost all the work.
Almost all of the fight scenes in "Arachna Power" qualify as awesome in my opinion. Let's not forget the part when Hunter spares Mantid's life and offers him his hand in friendship. Most people think that the man should have died. But I found it to be a good plot twist, and a refreshing change from the norm.