Drop: Gu'chi the Swarmbringer 
Zone: Timeless Isle
Approximate Drop Rate: unknown
85% Hit Chance
Chomps on the enemy, dealing 512 Critter damage.
100% Hit Chance
Starts a swarm, causing 177 Critter damage.
Opponents struck by the swarm take double damage for 2 rounds.
Swarm continues for 3 rounds.
Spits Poison goo onto the target, dealing 98 Critter damage each round and increasing damage taken by 25% for 3 rounds.
Patiently chew some grass. On the next round, you will deal 492 Critter damage in addition to your next attack.
Chew can deal damage from the back row.
95% Hit Chance
Deals 256 Undead damage.
The user is healed for 100% of the damage dealt.
80% Hit Chance
Burrow under the ground, becoming unattackable for one round.
On the next round, you attack, dealing 689 Beast damage.
Critters are immune to stun, root, and sleep effects.
50% from Beast abilities
33% from Elemental abilities
over 70 kills still no pet
This is one of my favorite new pets to be honest. I think the coloring is very nice and it looks MUCH cuter than most of the other "grub" type pets. I keep it out on my mage who uses purple as her main color.
Respawns on a timer. Minimum 30 minutes, maximum 60 minutes, so go do something else for half an hour after you kill him. He spawns at the south-east edge of Old Pi'jiu village, by the water.
The alemental event is right next door (on a separate 30-60 min respawn timer), so you can do that while you wait. You can evem pull alementals out to Gu'chi's spawn point if you're worried about missing him.
And no suprise that it was uncommon?