Museum
Heiroglyphs
Go to the Museum in Summers and on the second floor the guy blocking the door will ask for the Tiny Ruby that Poo has in his inventory.
In the next room there is a huge artifact with some hieroglyphs on it.
Be very careful with the Shattered Man as they can give you the ole one two punch and knock you out.
After the battle check the Hieroglyphs and Poo will read them.
You will also take a copy of them with you for reference later.
Fourside Dinosaur Museum
As you leave the museum in Summers, you'll get a phone call from Mr. Spoon at the museum in Fourside.
He has something super legit to show you.
Tip: At this point you may want to spend some time getting Poo's level up to par with the rest of the team.
You can go to Dusty Dunes Desert and hunt Criminal Caterpillar or something that is an easy win.
You will DEFINITELY thank yourself later since the enemies to come are very strong.
After you've leveled up your party, go back to the Fourside Museum to check out what Mr. Spoon was talking about.
At the far left of the main room you'll find Mr. Spoon blocking a door.
He says that if you bring him Venus' autograph he'll show you something extraordinary.
He doesn't really care what you get the autograph on.
Topolla Theater Presents Venus
Go buy yourself a ticket to see Venus perform.
She will give a saucy performance.
So much so that security has to restrain of her overly excited fans. He should be banned from the Theater IMHO.
After the performance you'll find Venus in her dressing room. Make sure you knock first. You wouldn't want to be mistaken for Donald Trump at a Miss America pageant.
She will give you her autograph on a banana peel. Yay.
Go back to Mr. Spoon and he'll flip his lid that you were able to get him her autograph.
He will keep his promise and let you see what's behind the door.
And... it's just a hole, awesome.
Before going down the sewers you may want to consider stocking up on supplies.
The enemies down there are no joke.