Mushroom Band starts with Ipore in Geffen, the Magic City (67, 87). The steps below are read from the quest's script on this server, in the order the script's quest stage moves through them.
Walkthrough
1 Talk to Ipore in Geffen, the Magic City (67, 87)
When Room in your inventory for what you get Have with you 300 × 
Mushroom SporeIt takes 300 × Mushroom SporeYou get 1 × 
Decorative MushroomIt's not as cool as having the mushroom actually attached to your skull, but it's all we can do. I'm sorry I let you down.
...There.
It's done. But are you okay? Luckily, I don't think I scalped you.
Anyway, now you can wear that mushroom at a rakish angle, the way it's supposed to be worn. Stay cool, you fashion rebel, you.
Script:
npc/quests/newgears/2004_headgears.txt:606
Rewards over the whole quest
How this page is made: every step comes from the NPC scripts the server loads for Episode 13.2 (the file and line are under each step). "When" lists the checks the script makes before that branch runs; "Have with you" are the items it counts; experience from getexp is multiplied by the server's 50x quest rate. NPC lines are the script's own text.