I cant believe we dont have a stag beetle but heres my idea for it.
Based on the real-life rainbow stag beetle (Phalacrognathus muelleri), known for its iridescent, color-shifting shell.
Class: Offense/Trickster
Passive: Stronger Headbutt and moves slightly faster
Off Ball: Prism Shard
Place a shard of a crystal at the beetles location and when activated again, teleport the beetle back with a windup time of around 5 seconds to that shard. But the shard must be used within 30 seconds or it breaks.
On ball: Using it dashes with the ball leaving a rainbow trail that when on the ground slows enemies and boosts teamates and in the air if an enemy is gliding, close their elytra while they are in the trail and if a teamate glides into the trail they follow the path of the trail still gliding.
Also, every few seconds maybe add a skill check(?) that when done correctly boosts the speed but when missed keeps it at same speed
Skins:
Maybe a dark shell with cracks in it glowing rainbow