Well, you can train your Chomby in Captain Scarblade's... . . .
Yes. It's worth around 30,000np. I found it out in jellyneo.net at the item database
The bands that play at the Tyrannian arena are Jazzmosis, Chomby and the Fungus Balls, Jub Zambra and the Cobrall Charmers and Yes Boy Ice Cream!.
you are.
Blue Chomby Morphing Potion (among other Neopet Morphing Potions) can seldom be found in stock in Kauvara's Magic Shop. Most Morphing Potions (especially those of LE and Restricted Neopets) are coveted by restockers, so be very quick if you see the Morphing Potion you want as most of the UB ones sell like hotcakes. Alternatively, you can get one off the Trading Post. Standard TP price for a Blue Chomby MP is 240,000 NP (as of 10/31/2014 according to Jellyneo's Item Database).
The weight of the watermelon on Neopets is varied day to day. Try searching 'Neopets Watermelon' or 'Neopet finders, cheats, and guides' on a searched engine.
october31
May 4th - Hissi Day
Uni Day is on March 2nd.
The ninth of September, I believe.
May 4th .
July the 17th
April 19th